/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:15:43,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:15:43,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:15:43,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:15:43,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:15:43,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:15:43,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:15:43,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:15:43,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:15:43,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:15:43,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:15:43,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:15:43,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:15:43,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:15:43,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:15:43,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:15:43,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:15:43,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:15:43,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:15:43,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:15:43,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:15:43,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:15:43,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:15:43,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:15:43,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 21:15:43,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 21:15:43,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 21:15:43,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 21:15:43,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 21:15:43,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 21:15:43,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 21:15:43,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 21:15:43,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 21:15:43,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 21:15:43,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 21:15:43,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 21:15:43,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 21:15:43,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 21:15:43,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:15:43,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:15:43,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:15:43,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 21:15:43,837 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:15:43,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:15:43,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:15:43,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:15:43,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:15:43,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:15:43,839 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:15:43,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:15:43,839 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:15:43,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:15:43,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:15:43,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:15:43,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:15:43,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:15:43,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:15:43,840 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:15:43,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:15:43,841 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:15:43,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:15:43,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:15:43,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:15:43,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:15:43,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:15:43,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:15:43,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:15:43,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:15:43,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:15:43,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:15:43,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:15:43,842 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:15:43,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:15:43,842 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:15:44,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:15:44,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:15:44,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:15:44,019 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:15:44,019 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:15:44,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-01-27 21:15:44,981 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:15:45,131 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:15:45,131 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-01-27 21:15:45,136 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800b6008e/bf564ab318be422aa3da97e5100339a2/FLAGcead4423b [2023-01-27 21:15:45,145 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800b6008e/bf564ab318be422aa3da97e5100339a2 [2023-01-27 21:15:45,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:15:45,147 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:15:45,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:15:45,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:15:45,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:15:45,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283f1dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45, skipping insertion in model container [2023-01-27 21:15:45,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:15:45,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:15:45,278 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-01-27 21:15:45,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:15:45,291 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:15:45,303 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-01-27 21:15:45,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:15:45,311 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:15:45,311 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:15:45,316 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:15:45,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45 WrapperNode [2023-01-27 21:15:45,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:15:45,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:15:45,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:15:45,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:15:45,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,340 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 140 [2023-01-27 21:15:45,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:15:45,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:15:45,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:15:45,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:15:45,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,356 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:15:45,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:15:45,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:15:45,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:15:45,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (1/1) ... [2023-01-27 21:15:45,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:15:45,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:45,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 21:15:45,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 21:15:45,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:15:45,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:15:45,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:15:45,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:15:45,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:15:45,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:15:45,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:15:45,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:15:45,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:15:45,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:15:45,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:15:45,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 21:15:45,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:15:45,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:15:45,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:15:45,440 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 21:15:45,529 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:15:45,532 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:15:45,809 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:15:45,902 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:15:45,903 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 21:15:45,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:15:45 BoogieIcfgContainer [2023-01-27 21:15:45,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:15:45,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:15:45,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:15:45,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:15:45,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:15:45" (1/3) ... [2023-01-27 21:15:45,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4853d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:15:45, skipping insertion in model container [2023-01-27 21:15:45,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:15:45" (2/3) ... [2023-01-27 21:15:45,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4853d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:15:45, skipping insertion in model container [2023-01-27 21:15:45,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:15:45" (3/3) ... [2023-01-27 21:15:45,910 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-01-27 21:15:45,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:15:45,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:15:45,932 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:15:45,970 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 21:15:45,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 109 transitions, 234 flow [2023-01-27 21:15:46,026 INFO L130 PetriNetUnfolder]: 9/107 cut-off events. [2023-01-27 21:15:46,026 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:15:46,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 107 events. 9/107 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-01-27 21:15:46,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 109 transitions, 234 flow [2023-01-27 21:15:46,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 99 transitions, 210 flow [2023-01-27 21:15:46,034 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:15:46,040 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 99 transitions, 210 flow [2023-01-27 21:15:46,042 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 99 transitions, 210 flow [2023-01-27 21:15:46,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 99 transitions, 210 flow [2023-01-27 21:15:46,058 INFO L130 PetriNetUnfolder]: 9/99 cut-off events. [2023-01-27 21:15:46,059 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:15:46,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 9/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-01-27 21:15:46,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-27 21:15:48,847 INFO L134 LiptonReduction]: Checked pairs total: 585 [2023-01-27 21:15:48,847 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-01-27 21:15:48,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:15:48,881 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4846becf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:15:48,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 21:15:48,886 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-27 21:15:48,886 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:15:48,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:48,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:48,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:48,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1648247353, now seen corresponding path program 1 times [2023-01-27 21:15:48,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:48,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872799787] [2023-01-27 21:15:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:15:49,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:49,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872799787] [2023-01-27 21:15:49,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872799787] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:15:49,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:15:49,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 21:15:49,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900366658] [2023-01-27 21:15:49,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:15:49,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:15:49,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:49,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:15:49,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:15:49,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 206 [2023-01-27 21:15:49,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:49,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 206 [2023-01-27 21:15:49,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:49,224 INFO L130 PetriNetUnfolder]: 66/116 cut-off events. [2023-01-27 21:15:49,225 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-27 21:15:49,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 324 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-01-27 21:15:49,228 INFO L137 encePairwiseOnDemand]: 202/206 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-01-27 21:15:49,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2023-01-27 21:15:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:15:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:15:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2023-01-27 21:15:49,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49838187702265374 [2023-01-27 21:15:49,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2023-01-27 21:15:49,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2023-01-27 21:15:49,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:49,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2023-01-27 21:15:49,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,248 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 308 transitions. [2023-01-27 21:15:49,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2023-01-27 21:15:49,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 21:15:49,251 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-01-27 21:15:49,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-01-27 21:15:49,255 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-27 21:15:49,255 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-01-27 21:15:49,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:49,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:49,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:15:49,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:49,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:49,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1272507108, now seen corresponding path program 1 times [2023-01-27 21:15:49,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:49,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294579191] [2023-01-27 21:15:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:49,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:15:49,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:49,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294579191] [2023-01-27 21:15:49,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294579191] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:15:49,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:15:49,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:15:49,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75257831] [2023-01-27 21:15:49,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:15:49,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:15:49,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:49,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:15:49,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:15:49,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:15:49,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:49,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:15:49,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:49,446 INFO L130 PetriNetUnfolder]: 113/217 cut-off events. [2023-01-27 21:15:49,446 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-01-27 21:15:49,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 217 events. 113/217 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 819 event pairs, 48 based on Foata normal form. 12/227 useless extension candidates. Maximal degree in co-relation 168. Up to 122 conditions per place. [2023-01-27 21:15:49,449 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 35 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-01-27 21:15:49,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 194 flow [2023-01-27 21:15:49,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:15:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:15:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 411 transitions. [2023-01-27 21:15:49,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990291262135922 [2023-01-27 21:15:49,453 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 411 transitions. [2023-01-27 21:15:49,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 411 transitions. [2023-01-27 21:15:49,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:49,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 411 transitions. [2023-01-27 21:15:49,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,457 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,458 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 411 transitions. [2023-01-27 21:15:49,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 194 flow [2023-01-27 21:15:49,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:15:49,459 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 84 flow [2023-01-27 21:15:49,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-01-27 21:15:49,460 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-01-27 21:15:49,460 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 84 flow [2023-01-27 21:15:49,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:49,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:49,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:15:49,461 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:49,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1514912191, now seen corresponding path program 1 times [2023-01-27 21:15:49,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:49,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085821962] [2023-01-27 21:15:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:49,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:15:49,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:49,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085821962] [2023-01-27 21:15:49,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085821962] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:15:49,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:15:49,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:15:49,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476487588] [2023-01-27 21:15:49,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:15:49,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:15:49,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:49,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:15:49,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:15:49,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:15:49,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:49,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:15:49,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:49,662 INFO L130 PetriNetUnfolder]: 79/161 cut-off events. [2023-01-27 21:15:49,662 INFO L131 PetriNetUnfolder]: For 65/70 co-relation queries the response was YES. [2023-01-27 21:15:49,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 161 events. 79/161 cut-off events. For 65/70 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 542 event pairs, 40 based on Foata normal form. 11/170 useless extension candidates. Maximal degree in co-relation 300. Up to 116 conditions per place. [2023-01-27 21:15:49,663 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 17 selfloop transitions, 2 changer transitions 16/36 dead transitions. [2023-01-27 21:15:49,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 185 flow [2023-01-27 21:15:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:15:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:15:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2023-01-27 21:15:49,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39611650485436894 [2023-01-27 21:15:49,664 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2023-01-27 21:15:49,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2023-01-27 21:15:49,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:49,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2023-01-27 21:15:49,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,667 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,667 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 84 flow. Second operand 5 states and 408 transitions. [2023-01-27 21:15:49,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 185 flow [2023-01-27 21:15:49,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 179 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-27 21:15:49,669 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 74 flow [2023-01-27 21:15:49,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-01-27 21:15:49,669 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-01-27 21:15:49,669 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 74 flow [2023-01-27 21:15:49,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:49,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:49,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 21:15:49,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:49,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:49,670 INFO L85 PathProgramCache]: Analyzing trace with hash 818882596, now seen corresponding path program 1 times [2023-01-27 21:15:49,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:49,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952458375] [2023-01-27 21:15:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:49,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:49,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:49,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952458375] [2023-01-27 21:15:49,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952458375] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:49,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578830123] [2023-01-27 21:15:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:49,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:49,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:49,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 21:15:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:49,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:15:49,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:49,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:49,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578830123] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:49,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:15:49,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-27 21:15:49,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19981560] [2023-01-27 21:15:49,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:15:49,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:15:49,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:49,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:15:49,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-27 21:15:49,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:15:49,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:49,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:49,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:15:49,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:50,004 INFO L130 PetriNetUnfolder]: 68/122 cut-off events. [2023-01-27 21:15:50,004 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-01-27 21:15:50,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 122 events. 68/122 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 350 event pairs, 23 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 312. Up to 92 conditions per place. [2023-01-27 21:15:50,005 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 21 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2023-01-27 21:15:50,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 149 flow [2023-01-27 21:15:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:15:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:15:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 399 transitions. [2023-01-27 21:15:50,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38737864077669903 [2023-01-27 21:15:50,007 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 399 transitions. [2023-01-27 21:15:50,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 399 transitions. [2023-01-27 21:15:50,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:50,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 399 transitions. [2023-01-27 21:15:50,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:50,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:50,010 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:50,010 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 74 flow. Second operand 5 states and 399 transitions. [2023-01-27 21:15:50,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 149 flow [2023-01-27 21:15:50,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 133 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-01-27 21:15:50,011 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2023-01-27 21:15:50,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-01-27 21:15:50,011 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-01-27 21:15:50,011 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2023-01-27 21:15:50,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:50,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:50,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:50,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 21:15:50,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:50,221 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:50,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1062328821, now seen corresponding path program 1 times [2023-01-27 21:15:50,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:50,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803395151] [2023-01-27 21:15:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:50,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:50,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:50,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803395151] [2023-01-27 21:15:50,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803395151] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:50,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820800205] [2023-01-27 21:15:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:50,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:50,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:50,338 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:50,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 21:15:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:50,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:15:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:50,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:50,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820800205] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:50,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:15:50,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-27 21:15:50,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242194228] [2023-01-27 21:15:50,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:15:50,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:15:50,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:50,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:15:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-27 21:15:50,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:15:50,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:50,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:50,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:15:50,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:50,549 INFO L130 PetriNetUnfolder]: 52/97 cut-off events. [2023-01-27 21:15:50,549 INFO L131 PetriNetUnfolder]: For 59/66 co-relation queries the response was YES. [2023-01-27 21:15:50,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 97 events. 52/97 cut-off events. For 59/66 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 220 event pairs, 20 based on Foata normal form. 15/108 useless extension candidates. Maximal degree in co-relation 267. Up to 75 conditions per place. [2023-01-27 21:15:50,552 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 22 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-01-27 21:15:50,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 163 flow [2023-01-27 21:15:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:15:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:15:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 399 transitions. [2023-01-27 21:15:50,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38737864077669903 [2023-01-27 21:15:50,553 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 399 transitions. [2023-01-27 21:15:50,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 399 transitions. [2023-01-27 21:15:50,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:50,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 399 transitions. [2023-01-27 21:15:50,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:50,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:50,557 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:50,557 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 399 transitions. [2023-01-27 21:15:50,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 163 flow [2023-01-27 21:15:50,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 149 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-01-27 21:15:50,559 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2023-01-27 21:15:50,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-01-27 21:15:50,561 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-01-27 21:15:50,563 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2023-01-27 21:15:50,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:50,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:50,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:50,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 21:15:50,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:50,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:50,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:50,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1690720491, now seen corresponding path program 1 times [2023-01-27 21:15:50,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:50,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515787415] [2023-01-27 21:15:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:50,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:51,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515787415] [2023-01-27 21:15:51,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515787415] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643859689] [2023-01-27 21:15:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:51,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:51,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:51,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:51,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 21:15:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:51,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-27 21:15:51,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:51,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:15:51,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:15:51,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:15:51,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 21:15:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:15:51,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:51,525 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int))) (<= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ c_~counter~0 1)))) is different from false [2023-01-27 21:15:51,539 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))))) is different from false [2023-01-27 21:15:51,548 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))) (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-01-27 21:15:51,587 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (<= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (< (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) is different from false [2023-01-27 21:15:51,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:15:51,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2023-01-27 21:15:51,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 254 [2023-01-27 21:15:51,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-01-27 21:15:51,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-01-27 21:15:51,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:15:51,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-01-27 21:15:51,667 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:15:51,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2023-01-27 21:15:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-01-27 21:15:51,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643859689] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:15:51,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:15:51,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-01-27 21:15:51,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202797077] [2023-01-27 21:15:51,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:15:51,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 21:15:51,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:51,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 21:15:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=217, Unknown=4, NotChecked=132, Total=420 [2023-01-27 21:15:51,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:15:51,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:51,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:51,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:15:51,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:51,919 INFO L130 PetriNetUnfolder]: 110/198 cut-off events. [2023-01-27 21:15:51,919 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-01-27 21:15:51,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 606 event pairs, 1 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2023-01-27 21:15:51,920 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-01-27 21:15:51,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 55 transitions, 313 flow [2023-01-27 21:15:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:15:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:15:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 534 transitions. [2023-01-27 21:15:51,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32402912621359226 [2023-01-27 21:15:51,923 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 534 transitions. [2023-01-27 21:15:51,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 534 transitions. [2023-01-27 21:15:51,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:51,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 534 transitions. [2023-01-27 21:15:51,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.75) internal successors, (534), 8 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:51,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:51,926 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:51,926 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 534 transitions. [2023-01-27 21:15:51,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 55 transitions, 313 flow [2023-01-27 21:15:51,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 301 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-01-27 21:15:51,928 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 172 flow [2023-01-27 21:15:51,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-01-27 21:15:51,928 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-01-27 21:15:51,928 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 172 flow [2023-01-27 21:15:51,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:51,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:51,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:51,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 21:15:52,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:52,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:52,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:52,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1211991097, now seen corresponding path program 2 times [2023-01-27 21:15:52,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:52,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129779709] [2023-01-27 21:15:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:52,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:52,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:52,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129779709] [2023-01-27 21:15:52,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129779709] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:52,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803451716] [2023-01-27 21:15:52,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:15:52,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:52,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:52,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:52,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 21:15:52,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:15:52,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:15:52,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 21:15:52,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:52,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:52,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:15:52,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2023-01-27 21:15:52,641 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 21:15:52,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-01-27 21:15:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:52,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803451716] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:15:52,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:15:52,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-27 21:15:52,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629900087] [2023-01-27 21:15:52,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:15:52,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:15:52,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:52,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:15:52,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:15:52,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-27 21:15:52,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 74.81818181818181) internal successors, (823), 11 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:52,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:52,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-27 21:15:52,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:52,799 INFO L130 PetriNetUnfolder]: 137/246 cut-off events. [2023-01-27 21:15:52,799 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2023-01-27 21:15:52,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 779 event pairs, 25 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2023-01-27 21:15:52,800 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-01-27 21:15:52,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 387 flow [2023-01-27 21:15:52,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:15:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:15:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2023-01-27 21:15:52,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-27 21:15:52,804 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2023-01-27 21:15:52,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2023-01-27 21:15:52,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:52,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2023-01-27 21:15:52,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:52,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:52,807 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:52,807 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 172 flow. Second operand 7 states and 549 transitions. [2023-01-27 21:15:52,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 387 flow [2023-01-27 21:15:52,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 362 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-27 21:15:52,809 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 266 flow [2023-01-27 21:15:52,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=266, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-01-27 21:15:52,809 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-01-27 21:15:52,809 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 266 flow [2023-01-27 21:15:52,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.81818181818181) internal successors, (823), 11 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:52,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:52,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:52,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 21:15:53,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:53,016 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:53,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1666552779, now seen corresponding path program 3 times [2023-01-27 21:15:53,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:53,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576189601] [2023-01-27 21:15:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:53,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:53,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:53,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576189601] [2023-01-27 21:15:53,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576189601] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:53,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107963882] [2023-01-27 21:15:53,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:15:53,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:53,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:53,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:53,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 21:15:53,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:15:53,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:15:53,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 21:15:53,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:53,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:53,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:15:53,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2023-01-27 21:15:53,464 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 21:15:53,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-01-27 21:15:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:53,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107963882] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:15:53,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:15:53,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-27 21:15:53,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922491661] [2023-01-27 21:15:53,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:15:53,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:15:53,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:53,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:15:53,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:15:53,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-27 21:15:53,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:53,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:53,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-27 21:15:53,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:53,626 INFO L130 PetriNetUnfolder]: 159/285 cut-off events. [2023-01-27 21:15:53,626 INFO L131 PetriNetUnfolder]: For 481/481 co-relation queries the response was YES. [2023-01-27 21:15:53,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 285 events. 159/285 cut-off events. For 481/481 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 962 event pairs, 33 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1087. Up to 233 conditions per place. [2023-01-27 21:15:53,628 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 45 selfloop transitions, 14 changer transitions 1/60 dead transitions. [2023-01-27 21:15:53,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 470 flow [2023-01-27 21:15:53,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:15:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:15:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2023-01-27 21:15:53,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-27 21:15:53,629 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2023-01-27 21:15:53,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2023-01-27 21:15:53,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:53,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2023-01-27 21:15:53,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:53,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:53,632 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:53,632 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 266 flow. Second operand 7 states and 549 transitions. [2023-01-27 21:15:53,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 470 flow [2023-01-27 21:15:53,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 449 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 21:15:53,635 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 339 flow [2023-01-27 21:15:53,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-01-27 21:15:53,635 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-01-27 21:15:53,635 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 339 flow [2023-01-27 21:15:53,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:53,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:53,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:53,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 21:15:53,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:53,841 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:53,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:53,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2131943909, now seen corresponding path program 4 times [2023-01-27 21:15:53,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:53,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548802041] [2023-01-27 21:15:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:53,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:54,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:54,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548802041] [2023-01-27 21:15:54,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548802041] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:54,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872820299] [2023-01-27 21:15:54,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:15:54,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:54,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:54,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:54,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 21:15:54,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:15:54,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:15:54,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 21:15:54,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:54,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:54,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:15:54,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2023-01-27 21:15:54,241 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 21:15:54,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-01-27 21:15:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:54,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872820299] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:15:54,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:15:54,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-27 21:15:54,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895842669] [2023-01-27 21:15:54,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:15:54,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:15:54,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:54,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:15:54,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:15:54,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-27 21:15:54,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 339 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:54,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:54,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-27 21:15:54,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:54,390 INFO L130 PetriNetUnfolder]: 175/314 cut-off events. [2023-01-27 21:15:54,390 INFO L131 PetriNetUnfolder]: For 675/675 co-relation queries the response was YES. [2023-01-27 21:15:54,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 314 events. 175/314 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1106 event pairs, 37 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 1248. Up to 258 conditions per place. [2023-01-27 21:15:54,392 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 50 selfloop transitions, 14 changer transitions 1/65 dead transitions. [2023-01-27 21:15:54,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 547 flow [2023-01-27 21:15:54,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:15:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:15:54,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 551 transitions. [2023-01-27 21:15:54,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38210818307905686 [2023-01-27 21:15:54,394 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 551 transitions. [2023-01-27 21:15:54,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 551 transitions. [2023-01-27 21:15:54,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:54,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 551 transitions. [2023-01-27 21:15:54,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:54,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:54,397 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:54,397 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 339 flow. Second operand 7 states and 551 transitions. [2023-01-27 21:15:54,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 547 flow [2023-01-27 21:15:54,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 516 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-27 21:15:54,400 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 383 flow [2023-01-27 21:15:54,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-01-27 21:15:54,401 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-01-27 21:15:54,401 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 383 flow [2023-01-27 21:15:54,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:54,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:54,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:54,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 21:15:54,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:54,607 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:54,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:54,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1053559879, now seen corresponding path program 5 times [2023-01-27 21:15:54,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:54,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310841277] [2023-01-27 21:15:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:54,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:54,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:54,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310841277] [2023-01-27 21:15:54,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310841277] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:54,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900265841] [2023-01-27 21:15:54,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:15:54,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:54,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:54,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:54,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 21:15:54,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:15:54,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:15:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 21:15:54,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:55,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:55,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:15:55,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2023-01-27 21:15:55,054 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 21:15:55,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-01-27 21:15:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:55,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900265841] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:15:55,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:15:55,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-27 21:15:55,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999015061] [2023-01-27 21:15:55,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:15:55,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:15:55,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:55,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:15:55,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:15:55,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-27 21:15:55,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 383 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:55,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:55,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-27 21:15:55,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:55,228 INFO L130 PetriNetUnfolder]: 197/353 cut-off events. [2023-01-27 21:15:55,228 INFO L131 PetriNetUnfolder]: For 1017/1017 co-relation queries the response was YES. [2023-01-27 21:15:55,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 353 events. 197/353 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1290 event pairs, 49 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 1455. Up to 301 conditions per place. [2023-01-27 21:15:55,231 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 50 selfloop transitions, 14 changer transitions 1/65 dead transitions. [2023-01-27 21:15:55,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 596 flow [2023-01-27 21:15:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:15:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:15:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 547 transitions. [2023-01-27 21:15:55,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37933425797503467 [2023-01-27 21:15:55,232 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 547 transitions. [2023-01-27 21:15:55,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 547 transitions. [2023-01-27 21:15:55,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:55,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 547 transitions. [2023-01-27 21:15:55,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.14285714285714) internal successors, (547), 7 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:55,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:55,235 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:55,235 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 383 flow. Second operand 7 states and 547 transitions. [2023-01-27 21:15:55,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 596 flow [2023-01-27 21:15:55,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 554 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-01-27 21:15:55,238 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 431 flow [2023-01-27 21:15:55,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-01-27 21:15:55,239 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-01-27 21:15:55,239 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 431 flow [2023-01-27 21:15:55,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:55,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:55,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:55,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 21:15:55,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:55,447 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:55,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash 448505845, now seen corresponding path program 6 times [2023-01-27 21:15:55,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:55,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107504815] [2023-01-27 21:15:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:55,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:55,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:55,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107504815] [2023-01-27 21:15:55,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107504815] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:55,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907156853] [2023-01-27 21:15:55,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:15:55,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:55,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:55,654 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:55,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 21:15:55,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:15:55,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:15:55,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 21:15:55,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:55,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:55,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:15:55,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-27 21:15:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:55,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907156853] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:15:55,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:15:55,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-27 21:15:55,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569521642] [2023-01-27 21:15:55,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:15:55,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:15:55,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:55,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:15:55,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:15:55,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-27 21:15:55,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 431 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:55,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:55,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-27 21:15:55,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:56,111 INFO L130 PetriNetUnfolder]: 225/402 cut-off events. [2023-01-27 21:15:56,112 INFO L131 PetriNetUnfolder]: For 1259/1259 co-relation queries the response was YES. [2023-01-27 21:15:56,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 402 events. 225/402 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1530 event pairs, 43 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 1682. Up to 330 conditions per place. [2023-01-27 21:15:56,114 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 52 selfloop transitions, 19 changer transitions 1/72 dead transitions. [2023-01-27 21:15:56,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 692 flow [2023-01-27 21:15:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:15:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:15:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2023-01-27 21:15:56,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-27 21:15:56,116 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2023-01-27 21:15:56,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2023-01-27 21:15:56,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:56,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2023-01-27 21:15:56,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:56,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:56,119 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:56,119 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 431 flow. Second operand 7 states and 549 transitions. [2023-01-27 21:15:56,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 692 flow [2023-01-27 21:15:56,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 645 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-01-27 21:15:56,123 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 525 flow [2023-01-27 21:15:56,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-01-27 21:15:56,124 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-01-27 21:15:56,124 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 525 flow [2023-01-27 21:15:56,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:56,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:56,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:56,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 21:15:56,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-27 21:15:56,334 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:56,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:56,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2097028727, now seen corresponding path program 7 times [2023-01-27 21:15:56,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:56,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233433405] [2023-01-27 21:15:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:56,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:56,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:56,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233433405] [2023-01-27 21:15:56,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233433405] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:56,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543987176] [2023-01-27 21:15:56,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:15:56,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:56,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:56,442 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:56,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 21:15:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:56,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:15:56,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:56,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:56,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543987176] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:15:56,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:15:56,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 21:15:56,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476792110] [2023-01-27 21:15:56,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:15:56,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 21:15:56,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:56,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 21:15:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:15:56,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:15:56,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 525 flow. Second operand has 14 states, 14 states have (on average 77.42857142857143) internal successors, (1084), 14 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:56,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:56,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:15:56,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:56,850 INFO L130 PetriNetUnfolder]: 371/695 cut-off events. [2023-01-27 21:15:56,850 INFO L131 PetriNetUnfolder]: For 2683/2712 co-relation queries the response was YES. [2023-01-27 21:15:56,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 695 events. 371/695 cut-off events. For 2683/2712 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3425 event pairs, 82 based on Foata normal form. 56/740 useless extension candidates. Maximal degree in co-relation 2560. Up to 275 conditions per place. [2023-01-27 21:15:56,855 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 103 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2023-01-27 21:15:56,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 123 transitions, 1289 flow [2023-01-27 21:15:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:15:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:15:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 648 transitions. [2023-01-27 21:15:56,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932038834951456 [2023-01-27 21:15:56,857 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 648 transitions. [2023-01-27 21:15:56,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 648 transitions. [2023-01-27 21:15:56,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:56,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 648 transitions. [2023-01-27 21:15:56,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:56,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:56,860 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:56,860 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 525 flow. Second operand 8 states and 648 transitions. [2023-01-27 21:15:56,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 123 transitions, 1289 flow [2023-01-27 21:15:56,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 1168 flow, removed 52 selfloop flow, removed 2 redundant places. [2023-01-27 21:15:56,870 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 694 flow [2023-01-27 21:15:56,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2023-01-27 21:15:56,870 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-01-27 21:15:56,870 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 694 flow [2023-01-27 21:15:56,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.42857142857143) internal successors, (1084), 14 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:56,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:56,871 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:56,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 21:15:57,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:57,076 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:57,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash 559731294, now seen corresponding path program 8 times [2023-01-27 21:15:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:57,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217897232] [2023-01-27 21:15:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:15:57,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:57,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217897232] [2023-01-27 21:15:57,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217897232] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:57,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225669321] [2023-01-27 21:15:57,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:15:57,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:57,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:57,140 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:57,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 21:15:57,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:15:57,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:15:57,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:15:57,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:15:57,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:15:57,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225669321] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:15:57,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:15:57,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 21:15:57,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903289550] [2023-01-27 21:15:57,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:15:57,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 21:15:57,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:57,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 21:15:57,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:15:57,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:15:57,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 694 flow. Second operand has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:57,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:57,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:15:57,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:57,464 INFO L130 PetriNetUnfolder]: 305/609 cut-off events. [2023-01-27 21:15:57,464 INFO L131 PetriNetUnfolder]: For 1817/1840 co-relation queries the response was YES. [2023-01-27 21:15:57,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2620 conditions, 609 events. 305/609 cut-off events. For 1817/1840 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3096 event pairs, 89 based on Foata normal form. 53/656 useless extension candidates. Maximal degree in co-relation 2322. Up to 251 conditions per place. [2023-01-27 21:15:57,467 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 66 selfloop transitions, 4 changer transitions 36/110 dead transitions. [2023-01-27 21:15:57,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 1137 flow [2023-01-27 21:15:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:15:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:15:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 647 transitions. [2023-01-27 21:15:57,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925970873786408 [2023-01-27 21:15:57,469 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 647 transitions. [2023-01-27 21:15:57,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 647 transitions. [2023-01-27 21:15:57,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:57,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 647 transitions. [2023-01-27 21:15:57,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.875) internal successors, (647), 8 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:57,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:57,472 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:57,472 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 694 flow. Second operand 8 states and 647 transitions. [2023-01-27 21:15:57,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 1137 flow [2023-01-27 21:15:57,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 1129 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 21:15:57,480 INFO L231 Difference]: Finished difference. Result has 86 places, 59 transitions, 567 flow [2023-01-27 21:15:57,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=567, PETRI_PLACES=86, PETRI_TRANSITIONS=59} [2023-01-27 21:15:57,480 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-01-27 21:15:57,481 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 59 transitions, 567 flow [2023-01-27 21:15:57,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:57,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:57,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:57,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 21:15:57,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-27 21:15:57,686 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:57,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:57,687 INFO L85 PathProgramCache]: Analyzing trace with hash 650633796, now seen corresponding path program 9 times [2023-01-27 21:15:57,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:57,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538782945] [2023-01-27 21:15:57,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:57,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:15:57,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:57,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538782945] [2023-01-27 21:15:57,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538782945] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:57,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94081534] [2023-01-27 21:15:57,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:15:57,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:57,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:57,752 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:57,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 21:15:57,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:15:57,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:15:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:15:57,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:15:57,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:15:57,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94081534] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:15:57,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:15:57,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 21:15:57,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960020514] [2023-01-27 21:15:57,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:15:57,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 21:15:57,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:57,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 21:15:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:15:57,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:15:57,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 59 transitions, 567 flow. Second operand has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:57,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:57,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:15:57,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:58,038 INFO L130 PetriNetUnfolder]: 165/296 cut-off events. [2023-01-27 21:15:58,038 INFO L131 PetriNetUnfolder]: For 1576/1583 co-relation queries the response was YES. [2023-01-27 21:15:58,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1606 conditions, 296 events. 165/296 cut-off events. For 1576/1583 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1036 event pairs, 28 based on Foata normal form. 51/346 useless extension candidates. Maximal degree in co-relation 1547. Up to 139 conditions per place. [2023-01-27 21:15:58,040 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 41 selfloop transitions, 25 changer transitions 0/70 dead transitions. [2023-01-27 21:15:58,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 70 transitions, 785 flow [2023-01-27 21:15:58,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:15:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:15:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-01-27 21:15:58,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855755894590846 [2023-01-27 21:15:58,042 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-01-27 21:15:58,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-01-27 21:15:58,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:58,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-01-27 21:15:58,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:58,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:58,044 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:58,044 INFO L175 Difference]: Start difference. First operand has 86 places, 59 transitions, 567 flow. Second operand 7 states and 556 transitions. [2023-01-27 21:15:58,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 70 transitions, 785 flow [2023-01-27 21:15:58,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 630 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-01-27 21:15:58,049 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 510 flow [2023-01-27 21:15:58,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=510, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-27 21:15:58,050 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-01-27 21:15:58,050 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 510 flow [2023-01-27 21:15:58,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:58,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:58,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:58,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 21:15:58,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 21:15:58,255 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:58,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:58,256 INFO L85 PathProgramCache]: Analyzing trace with hash -937838569, now seen corresponding path program 10 times [2023-01-27 21:15:58,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:58,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989214015] [2023-01-27 21:15:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:58,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:15:58,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:58,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989214015] [2023-01-27 21:15:58,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989214015] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:58,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958252442] [2023-01-27 21:15:58,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:15:58,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:58,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:58,365 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:58,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 21:15:58,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:15:58,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:15:58,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:15:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:15:58,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:15:58,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958252442] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:15:58,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:15:58,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 21:15:58,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049001662] [2023-01-27 21:15:58,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:15:58,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 21:15:58,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:15:58,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 21:15:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:15:58,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:15:58,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 510 flow. Second operand has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:58,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:15:58,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:15:58,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:15:58,609 INFO L130 PetriNetUnfolder]: 120/214 cut-off events. [2023-01-27 21:15:58,609 INFO L131 PetriNetUnfolder]: For 1323/1332 co-relation queries the response was YES. [2023-01-27 21:15:58,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 214 events. 120/214 cut-off events. For 1323/1332 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 650 event pairs, 27 based on Foata normal form. 31/242 useless extension candidates. Maximal degree in co-relation 1167. Up to 118 conditions per place. [2023-01-27 21:15:58,611 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 42 selfloop transitions, 25 changer transitions 0/71 dead transitions. [2023-01-27 21:15:58,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 730 flow [2023-01-27 21:15:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:15:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:15:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-01-27 21:15:58,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855755894590846 [2023-01-27 21:15:58,613 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-01-27 21:15:58,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-01-27 21:15:58,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:15:58,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-01-27 21:15:58,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:58,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:58,615 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:58,615 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 510 flow. Second operand 7 states and 556 transitions. [2023-01-27 21:15:58,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 730 flow [2023-01-27 21:15:58,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 648 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-01-27 21:15:58,619 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 522 flow [2023-01-27 21:15:58,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2023-01-27 21:15:58,620 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2023-01-27 21:15:58,620 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 522 flow [2023-01-27 21:15:58,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:15:58,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:15:58,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:15:58,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 21:15:58,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 21:15:58,825 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:15:58,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:15:58,825 INFO L85 PathProgramCache]: Analyzing trace with hash -603236243, now seen corresponding path program 11 times [2023-01-27 21:15:58,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:15:58,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107717402] [2023-01-27 21:15:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:15:58,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:15:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:15:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:15:59,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:15:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107717402] [2023-01-27 21:15:59,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107717402] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:15:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532011271] [2023-01-27 21:15:59,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:15:59,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:15:59,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:15:59,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:15:59,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 21:15:59,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:15:59,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:15:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-27 21:15:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:15:59,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:15:59,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-27 21:15:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:15:59,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:15:59,912 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_446 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset))) (+ c_~counter~0 1))) (forall ((v_ArrVal_446 (Array Int Int))) (<= c_~counter~0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~A~0.base))) (+ (select .cse2 .cse1) (select .cse2 c_~A~0.offset))))))) is different from false [2023-01-27 21:15:59,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:15:59,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 68 [2023-01-27 21:15:59,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:15:59,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2023-01-27 21:16:00,028 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:00,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532011271] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:00,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:00,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 29 [2023-01-27 21:16:00,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920610903] [2023-01-27 21:16:00,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:00,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 21:16:00,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 21:16:00,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=761, Unknown=7, NotChecked=56, Total=930 [2023-01-27 21:16:00,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:16:00,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 522 flow. Second operand has 31 states, 31 states have (on average 54.645161290322584) internal successors, (1694), 31 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:00,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:00,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:16:00,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:01,213 INFO L130 PetriNetUnfolder]: 182/321 cut-off events. [2023-01-27 21:16:01,213 INFO L131 PetriNetUnfolder]: For 1842/1842 co-relation queries the response was YES. [2023-01-27 21:16:01,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1810 conditions, 321 events. 182/321 cut-off events. For 1842/1842 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1065 event pairs, 11 based on Foata normal form. 1/321 useless extension candidates. Maximal degree in co-relation 1758. Up to 187 conditions per place. [2023-01-27 21:16:01,215 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 65 selfloop transitions, 40 changer transitions 1/106 dead transitions. [2023-01-27 21:16:01,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 991 flow [2023-01-27 21:16:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 21:16:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 21:16:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 930 transitions. [2023-01-27 21:16:01,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2821601941747573 [2023-01-27 21:16:01,219 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 930 transitions. [2023-01-27 21:16:01,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 930 transitions. [2023-01-27 21:16:01,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:01,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 930 transitions. [2023-01-27 21:16:01,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.125) internal successors, (930), 16 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:01,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:01,228 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:01,228 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 522 flow. Second operand 16 states and 930 transitions. [2023-01-27 21:16:01,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 991 flow [2023-01-27 21:16:01,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 106 transitions, 924 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-01-27 21:16:01,249 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 726 flow [2023-01-27 21:16:01,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=726, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2023-01-27 21:16:01,250 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-01-27 21:16:01,250 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 726 flow [2023-01-27 21:16:01,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 54.645161290322584) internal successors, (1694), 31 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:01,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:01,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:01,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:01,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 21:16:01,451 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:01,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1564132795, now seen corresponding path program 12 times [2023-01-27 21:16:01,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:01,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895577582] [2023-01-27 21:16:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:01,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:01,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:01,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895577582] [2023-01-27 21:16:01,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895577582] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:01,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95219798] [2023-01-27 21:16:01,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:16:01,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:01,848 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:01,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 21:16:01,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:16:01,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:01,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-27 21:16:01,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:02,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:02,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:02,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 44 [2023-01-27 21:16:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:02,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95219798] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:02,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:02,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-01-27 21:16:02,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729748746] [2023-01-27 21:16:02,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:02,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:16:02,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:02,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:16:02,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:16:02,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-27 21:16:02,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 726 flow. Second operand has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:02,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:02,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-27 21:16:02,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:02,569 INFO L130 PetriNetUnfolder]: 270/480 cut-off events. [2023-01-27 21:16:02,570 INFO L131 PetriNetUnfolder]: For 2965/2965 co-relation queries the response was YES. [2023-01-27 21:16:02,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 480 events. 270/480 cut-off events. For 2965/2965 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1789 event pairs, 29 based on Foata normal form. 2/481 useless extension candidates. Maximal degree in co-relation 2770. Up to 317 conditions per place. [2023-01-27 21:16:02,573 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 95 selfloop transitions, 39 changer transitions 2/136 dead transitions. [2023-01-27 21:16:02,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1436 flow [2023-01-27 21:16:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:16:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:16:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1098 transitions. [2023-01-27 21:16:02,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-27 21:16:02,589 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1098 transitions. [2023-01-27 21:16:02,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1098 transitions. [2023-01-27 21:16:02,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:02,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1098 transitions. [2023-01-27 21:16:02,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 78.42857142857143) internal successors, (1098), 14 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:02,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:02,603 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:02,603 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 726 flow. Second operand 14 states and 1098 transitions. [2023-01-27 21:16:02,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1436 flow [2023-01-27 21:16:02,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 136 transitions, 1295 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-01-27 21:16:02,612 INFO L231 Difference]: Finished difference. Result has 102 places, 93 transitions, 1004 flow [2023-01-27 21:16:02,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1004, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2023-01-27 21:16:02,612 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-01-27 21:16:02,612 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 1004 flow [2023-01-27 21:16:02,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:02,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:02,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:02,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:02,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:02,813 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:02,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:02,814 INFO L85 PathProgramCache]: Analyzing trace with hash -701418181, now seen corresponding path program 13 times [2023-01-27 21:16:02,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:02,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713249097] [2023-01-27 21:16:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:02,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:03,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:03,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713249097] [2023-01-27 21:16:03,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713249097] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:03,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574937119] [2023-01-27 21:16:03,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:16:03,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:03,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:03,401 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:03,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 21:16:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:03,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 21:16:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:03,593 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:03,594 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:03,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2023-01-27 21:16:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:03,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:03,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:03,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 44 [2023-01-27 21:16:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:03,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574937119] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:03,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:03,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 18 [2023-01-27 21:16:03,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579311746] [2023-01-27 21:16:03,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:03,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:16:03,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:16:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-27 21:16:03,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:03,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 1004 flow. Second operand has 20 states, 20 states have (on average 62.1) internal successors, (1242), 20 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:03,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:03,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:03,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:04,253 INFO L130 PetriNetUnfolder]: 302/538 cut-off events. [2023-01-27 21:16:04,254 INFO L131 PetriNetUnfolder]: For 3587/3587 co-relation queries the response was YES. [2023-01-27 21:16:04,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 538 events. 302/538 cut-off events. For 3587/3587 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2088 event pairs, 47 based on Foata normal form. 2/539 useless extension candidates. Maximal degree in co-relation 3144. Up to 408 conditions per place. [2023-01-27 21:16:04,258 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 96 selfloop transitions, 35 changer transitions 2/133 dead transitions. [2023-01-27 21:16:04,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 1484 flow [2023-01-27 21:16:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 21:16:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 21:16:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1045 transitions. [2023-01-27 21:16:04,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170509708737864 [2023-01-27 21:16:04,260 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1045 transitions. [2023-01-27 21:16:04,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1045 transitions. [2023-01-27 21:16:04,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:04,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1045 transitions. [2023-01-27 21:16:04,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.3125) internal successors, (1045), 16 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:04,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:04,266 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:04,266 INFO L175 Difference]: Start difference. First operand has 102 places, 93 transitions, 1004 flow. Second operand 16 states and 1045 transitions. [2023-01-27 21:16:04,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 1484 flow [2023-01-27 21:16:04,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 133 transitions, 1329 flow, removed 71 selfloop flow, removed 3 redundant places. [2023-01-27 21:16:04,279 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 1013 flow [2023-01-27 21:16:04,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1013, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2023-01-27 21:16:04,279 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 95 predicate places. [2023-01-27 21:16:04,279 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 1013 flow [2023-01-27 21:16:04,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.1) internal successors, (1242), 20 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:04,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:04,280 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:04,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-27 21:16:04,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 21:16:04,485 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:04,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1056177927, now seen corresponding path program 14 times [2023-01-27 21:16:04,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:04,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061738581] [2023-01-27 21:16:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:04,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:04,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:04,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061738581] [2023-01-27 21:16:04,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061738581] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:04,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822381068] [2023-01-27 21:16:04,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:16:04,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:04,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:04,922 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:04,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 21:16:05,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:16:05,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:05,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-27 21:16:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:05,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:05,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:05,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-27 21:16:05,251 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-27 21:16:05,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-27 21:16:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:05,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822381068] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:05,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:05,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 17 [2023-01-27 21:16:05,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439289601] [2023-01-27 21:16:05,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:05,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:16:05,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:05,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:16:05,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:16:05,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:05,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 1013 flow. Second operand has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:05,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:05,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:05,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:05,659 INFO L130 PetriNetUnfolder]: 374/666 cut-off events. [2023-01-27 21:16:05,659 INFO L131 PetriNetUnfolder]: For 4600/4600 co-relation queries the response was YES. [2023-01-27 21:16:05,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3907 conditions, 666 events. 374/666 cut-off events. For 4600/4600 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2769 event pairs, 71 based on Foata normal form. 2/667 useless extension candidates. Maximal degree in co-relation 3841. Up to 536 conditions per place. [2023-01-27 21:16:05,667 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 115 selfloop transitions, 30 changer transitions 2/147 dead transitions. [2023-01-27 21:16:05,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 147 transitions, 1749 flow [2023-01-27 21:16:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 21:16:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 21:16:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1043 transitions. [2023-01-27 21:16:05,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31644417475728154 [2023-01-27 21:16:05,671 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1043 transitions. [2023-01-27 21:16:05,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1043 transitions. [2023-01-27 21:16:05,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:05,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1043 transitions. [2023-01-27 21:16:05,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.1875) internal successors, (1043), 16 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:05,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:05,700 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:05,700 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 1013 flow. Second operand 16 states and 1043 transitions. [2023-01-27 21:16:05,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 147 transitions, 1749 flow [2023-01-27 21:16:05,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 147 transitions, 1647 flow, removed 27 selfloop flow, removed 12 redundant places. [2023-01-27 21:16:05,713 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1287 flow [2023-01-27 21:16:05,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1287, PETRI_PLACES=122, PETRI_TRANSITIONS=111} [2023-01-27 21:16:05,713 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2023-01-27 21:16:05,713 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1287 flow [2023-01-27 21:16:05,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:05,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:05,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:05,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:05,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:05,919 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:05,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash -425348409, now seen corresponding path program 15 times [2023-01-27 21:16:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:05,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269729480] [2023-01-27 21:16:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:05,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:06,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:06,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269729480] [2023-01-27 21:16:06,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269729480] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:06,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434835707] [2023-01-27 21:16:06,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:16:06,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:06,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:06,385 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:06,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 21:16:06,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:16:06,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:06,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 21:16:06,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:06,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:06,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:06,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-27 21:16:06,887 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-27 21:16:06,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-27 21:16:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:06,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434835707] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:06,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:06,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-01-27 21:16:06,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406361269] [2023-01-27 21:16:06,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:06,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 21:16:06,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:06,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 21:16:06,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-01-27 21:16:06,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:06,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 1287 flow. Second operand has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:06,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:06,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:06,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:07,574 INFO L130 PetriNetUnfolder]: 460/822 cut-off events. [2023-01-27 21:16:07,574 INFO L131 PetriNetUnfolder]: For 6438/6438 co-relation queries the response was YES. [2023-01-27 21:16:07,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 822 events. 460/822 cut-off events. For 6438/6438 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3679 event pairs, 94 based on Foata normal form. 2/823 useless extension candidates. Maximal degree in co-relation 4883. Up to 663 conditions per place. [2023-01-27 21:16:07,580 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 134 selfloop transitions, 37 changer transitions 2/173 dead transitions. [2023-01-27 21:16:07,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 173 transitions, 2127 flow [2023-01-27 21:16:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 21:16:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 21:16:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1241 transitions. [2023-01-27 21:16:07,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170669391926418 [2023-01-27 21:16:07,591 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1241 transitions. [2023-01-27 21:16:07,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1241 transitions. [2023-01-27 21:16:07,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:07,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1241 transitions. [2023-01-27 21:16:07,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.3157894736842) internal successors, (1241), 19 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:07,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:07,597 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:07,597 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1287 flow. Second operand 19 states and 1241 transitions. [2023-01-27 21:16:07,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 173 transitions, 2127 flow [2023-01-27 21:16:07,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 173 transitions, 1875 flow, removed 113 selfloop flow, removed 8 redundant places. [2023-01-27 21:16:07,613 INFO L231 Difference]: Finished difference. Result has 137 places, 125 transitions, 1438 flow [2023-01-27 21:16:07,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1438, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2023-01-27 21:16:07,613 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2023-01-27 21:16:07,613 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 1438 flow [2023-01-27 21:16:07,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:07,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:07,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:07,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:07,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:07,820 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:07,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2097113607, now seen corresponding path program 16 times [2023-01-27 21:16:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:07,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642924223] [2023-01-27 21:16:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:07,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:08,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:08,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642924223] [2023-01-27 21:16:08,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642924223] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:08,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130064668] [2023-01-27 21:16:08,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:16:08,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:08,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:08,254 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:08,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 21:16:08,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:16:08,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:08,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 21:16:08,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:08,503 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:08,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:08,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2023-01-27 21:16:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:08,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:08,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:08,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-27 21:16:08,658 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-27 21:16:08,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-27 21:16:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:08,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130064668] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:08,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:08,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-01-27 21:16:08,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401348949] [2023-01-27 21:16:08,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:08,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:16:08,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:08,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:16:08,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-01-27 21:16:08,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:08,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 1438 flow. Second operand has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:08,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:08,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:08,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:09,152 INFO L130 PetriNetUnfolder]: 532/953 cut-off events. [2023-01-27 21:16:09,152 INFO L131 PetriNetUnfolder]: For 7050/7050 co-relation queries the response was YES. [2023-01-27 21:16:09,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 953 events. 532/953 cut-off events. For 7050/7050 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4488 event pairs, 127 based on Foata normal form. 2/954 useless extension candidates. Maximal degree in co-relation 5526. Up to 806 conditions per place. [2023-01-27 21:16:09,159 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 140 selfloop transitions, 32 changer transitions 3/175 dead transitions. [2023-01-27 21:16:09,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 175 transitions, 2175 flow [2023-01-27 21:16:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 21:16:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 21:16:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 985 transitions. [2023-01-27 21:16:09,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3187702265372168 [2023-01-27 21:16:09,161 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 985 transitions. [2023-01-27 21:16:09,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 985 transitions. [2023-01-27 21:16:09,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:09,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 985 transitions. [2023-01-27 21:16:09,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 65.66666666666667) internal successors, (985), 15 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:09,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:09,165 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:09,165 INFO L175 Difference]: Start difference. First operand has 137 places, 125 transitions, 1438 flow. Second operand 15 states and 985 transitions. [2023-01-27 21:16:09,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 175 transitions, 2175 flow [2023-01-27 21:16:09,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 175 transitions, 1910 flow, removed 109 selfloop flow, removed 12 redundant places. [2023-01-27 21:16:09,184 INFO L231 Difference]: Finished difference. Result has 143 places, 135 transitions, 1486 flow [2023-01-27 21:16:09,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1486, PETRI_PLACES=143, PETRI_TRANSITIONS=135} [2023-01-27 21:16:09,184 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-01-27 21:16:09,184 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 135 transitions, 1486 flow [2023-01-27 21:16:09,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:09,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:09,185 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:09,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:09,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:09,410 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:09,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:09,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1659998111, now seen corresponding path program 17 times [2023-01-27 21:16:09,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:09,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558206489] [2023-01-27 21:16:09,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:09,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:09,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558206489] [2023-01-27 21:16:09,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558206489] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536821024] [2023-01-27 21:16:09,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:16:09,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:09,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:09,851 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:09,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 21:16:09,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:16:09,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:09,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 21:16:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:10,120 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:10,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:10,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2023-01-27 21:16:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:10,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:10,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:10,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-27 21:16:10,265 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-27 21:16:10,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-27 21:16:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:10,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536821024] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:10,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:10,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-01-27 21:16:10,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375484959] [2023-01-27 21:16:10,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:10,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:16:10,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:16:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-01-27 21:16:10,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:10,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 135 transitions, 1486 flow. Second operand has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:10,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:10,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:10,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:10,794 INFO L130 PetriNetUnfolder]: 564/1011 cut-off events. [2023-01-27 21:16:10,794 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-01-27 21:16:10,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5706 conditions, 1011 events. 564/1011 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4841 event pairs, 135 based on Foata normal form. 2/1012 useless extension candidates. Maximal degree in co-relation 5628. Up to 896 conditions per place. [2023-01-27 21:16:10,824 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 144 selfloop transitions, 26 changer transitions 2/172 dead transitions. [2023-01-27 21:16:10,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 172 transitions, 2082 flow [2023-01-27 21:16:10,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:16:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:16:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 916 transitions. [2023-01-27 21:16:10,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31761442441054094 [2023-01-27 21:16:10,826 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 916 transitions. [2023-01-27 21:16:10,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 916 transitions. [2023-01-27 21:16:10,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:10,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 916 transitions. [2023-01-27 21:16:10,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.42857142857143) internal successors, (916), 14 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:10,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:10,830 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:10,830 INFO L175 Difference]: Start difference. First operand has 143 places, 135 transitions, 1486 flow. Second operand 14 states and 916 transitions. [2023-01-27 21:16:10,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 172 transitions, 2082 flow [2023-01-27 21:16:10,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 172 transitions, 1928 flow, removed 64 selfloop flow, removed 8 redundant places. [2023-01-27 21:16:10,863 INFO L231 Difference]: Finished difference. Result has 150 places, 139 transitions, 1510 flow [2023-01-27 21:16:10,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1510, PETRI_PLACES=150, PETRI_TRANSITIONS=139} [2023-01-27 21:16:10,877 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2023-01-27 21:16:10,877 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 139 transitions, 1510 flow [2023-01-27 21:16:10,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:10,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:10,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:10,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:11,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:11,082 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:11,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:11,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2101988531, now seen corresponding path program 18 times [2023-01-27 21:16:11,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:11,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592013829] [2023-01-27 21:16:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:11,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:11,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:11,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592013829] [2023-01-27 21:16:11,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592013829] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:11,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286111076] [2023-01-27 21:16:11,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:16:11,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:11,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:11,542 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:11,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 21:16:11,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:16:11,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:11,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-27 21:16:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:11,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:11,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:11,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-27 21:16:11,933 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-27 21:16:11,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-27 21:16:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:12,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286111076] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:12,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:12,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-01-27 21:16:12,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228143600] [2023-01-27 21:16:12,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:12,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:16:12,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:16:12,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-01-27 21:16:12,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:12,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 139 transitions, 1510 flow. Second operand has 25 states, 25 states have (on average 61.92) internal successors, (1548), 25 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:12,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:12,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:12,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:12,481 INFO L130 PetriNetUnfolder]: 626/1123 cut-off events. [2023-01-27 21:16:12,482 INFO L131 PetriNetUnfolder]: For 8749/8749 co-relation queries the response was YES. [2023-01-27 21:16:12,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6436 conditions, 1123 events. 626/1123 cut-off events. For 8749/8749 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5529 event pairs, 163 based on Foata normal form. 2/1124 useless extension candidates. Maximal degree in co-relation 6355. Up to 995 conditions per place. [2023-01-27 21:16:12,489 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 145 selfloop transitions, 34 changer transitions 2/181 dead transitions. [2023-01-27 21:16:12,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 181 transitions, 2298 flow [2023-01-27 21:16:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:16:12,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:16:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 916 transitions. [2023-01-27 21:16:12,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31761442441054094 [2023-01-27 21:16:12,490 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 916 transitions. [2023-01-27 21:16:12,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 916 transitions. [2023-01-27 21:16:12,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:12,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 916 transitions. [2023-01-27 21:16:12,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.42857142857143) internal successors, (916), 14 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:12,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:12,494 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:12,494 INFO L175 Difference]: Start difference. First operand has 150 places, 139 transitions, 1510 flow. Second operand 14 states and 916 transitions. [2023-01-27 21:16:12,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 181 transitions, 2298 flow [2023-01-27 21:16:12,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 181 transitions, 2180 flow, removed 43 selfloop flow, removed 10 redundant places. [2023-01-27 21:16:12,512 INFO L231 Difference]: Finished difference. Result has 157 places, 149 transitions, 1780 flow [2023-01-27 21:16:12,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1780, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2023-01-27 21:16:12,513 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-01-27 21:16:12,513 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 1780 flow [2023-01-27 21:16:12,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.92) internal successors, (1548), 25 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:12,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:12,513 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:12,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:12,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-27 21:16:12,718 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:12,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash 556637051, now seen corresponding path program 19 times [2023-01-27 21:16:12,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:12,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166528213] [2023-01-27 21:16:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:12,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:13,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:13,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166528213] [2023-01-27 21:16:13,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166528213] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:13,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919449950] [2023-01-27 21:16:13,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:16:13,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:13,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:13,304 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:13,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 21:16:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:13,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 21:16:13,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:13,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:13,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:13,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-27 21:16:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:13,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919449950] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:13,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:13,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 25 [2023-01-27 21:16:13,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645957973] [2023-01-27 21:16:13,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:13,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 21:16:13,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:13,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 21:16:13,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2023-01-27 21:16:13,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:16:13,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 1780 flow. Second operand has 27 states, 27 states have (on average 54.81481481481482) internal successors, (1480), 27 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:13,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:13,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:16:13,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:14,364 INFO L130 PetriNetUnfolder]: 688/1235 cut-off events. [2023-01-27 21:16:14,364 INFO L131 PetriNetUnfolder]: For 11490/11490 co-relation queries the response was YES. [2023-01-27 21:16:14,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7358 conditions, 1235 events. 688/1235 cut-off events. For 11490/11490 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6265 event pairs, 165 based on Foata normal form. 2/1236 useless extension candidates. Maximal degree in co-relation 7272. Up to 993 conditions per place. [2023-01-27 21:16:14,372 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 135 selfloop transitions, 57 changer transitions 2/194 dead transitions. [2023-01-27 21:16:14,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 194 transitions, 2631 flow [2023-01-27 21:16:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:16:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:16:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 983 transitions. [2023-01-27 21:16:14,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2806967447173044 [2023-01-27 21:16:14,373 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 983 transitions. [2023-01-27 21:16:14,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 983 transitions. [2023-01-27 21:16:14,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:14,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 983 transitions. [2023-01-27 21:16:14,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.8235294117647) internal successors, (983), 17 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:14,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:14,379 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:14,379 INFO L175 Difference]: Start difference. First operand has 157 places, 149 transitions, 1780 flow. Second operand 17 states and 983 transitions. [2023-01-27 21:16:14,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 194 transitions, 2631 flow [2023-01-27 21:16:14,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 194 transitions, 2398 flow, removed 105 selfloop flow, removed 7 redundant places. [2023-01-27 21:16:14,406 INFO L231 Difference]: Finished difference. Result has 170 places, 160 transitions, 2024 flow [2023-01-27 21:16:14,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2024, PETRI_PLACES=170, PETRI_TRANSITIONS=160} [2023-01-27 21:16:14,407 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 149 predicate places. [2023-01-27 21:16:14,407 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 160 transitions, 2024 flow [2023-01-27 21:16:14,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.81481481481482) internal successors, (1480), 27 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:14,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:14,407 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:14,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:14,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-27 21:16:14,612 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:14,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1024293669, now seen corresponding path program 20 times [2023-01-27 21:16:14,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:14,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131137346] [2023-01-27 21:16:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:14,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:14,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131137346] [2023-01-27 21:16:14,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131137346] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263309425] [2023-01-27 21:16:14,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:16:14,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:14,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:14,984 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:14,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 21:16:15,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:16:15,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-27 21:16:15,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:15,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:15,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:15,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-27 21:16:15,312 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-27 21:16:15,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-27 21:16:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:15,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263309425] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:15,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:15,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 21 [2023-01-27 21:16:15,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200805911] [2023-01-27 21:16:15,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:15,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 21:16:15,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:15,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 21:16:15,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-01-27 21:16:15,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:15,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 160 transitions, 2024 flow. Second operand has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:15,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:15,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:15,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:15,878 INFO L130 PetriNetUnfolder]: 754/1353 cut-off events. [2023-01-27 21:16:15,879 INFO L131 PetriNetUnfolder]: For 14228/14228 co-relation queries the response was YES. [2023-01-27 21:16:15,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8245 conditions, 1353 events. 754/1353 cut-off events. For 14228/14228 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7022 event pairs, 201 based on Foata normal form. 2/1355 useless extension candidates. Maximal degree in co-relation 8153. Up to 1204 conditions per place. [2023-01-27 21:16:15,886 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 172 selfloop transitions, 32 changer transitions 2/206 dead transitions. [2023-01-27 21:16:15,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 206 transitions, 2973 flow [2023-01-27 21:16:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 21:16:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 21:16:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1041 transitions. [2023-01-27 21:16:15,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3158373786407767 [2023-01-27 21:16:15,887 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1041 transitions. [2023-01-27 21:16:15,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1041 transitions. [2023-01-27 21:16:15,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:15,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1041 transitions. [2023-01-27 21:16:15,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.0625) internal successors, (1041), 16 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:15,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:15,891 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:15,891 INFO L175 Difference]: Start difference. First operand has 170 places, 160 transitions, 2024 flow. Second operand 16 states and 1041 transitions. [2023-01-27 21:16:15,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 206 transitions, 2973 flow [2023-01-27 21:16:15,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 206 transitions, 2665 flow, removed 129 selfloop flow, removed 11 redundant places. [2023-01-27 21:16:15,921 INFO L231 Difference]: Finished difference. Result has 177 places, 172 transitions, 2182 flow [2023-01-27 21:16:15,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2182, PETRI_PLACES=177, PETRI_TRANSITIONS=172} [2023-01-27 21:16:15,921 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2023-01-27 21:16:15,921 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 172 transitions, 2182 flow [2023-01-27 21:16:15,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:15,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:15,921 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:15,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:16,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:16,126 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:16,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:16,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1652983725, now seen corresponding path program 21 times [2023-01-27 21:16:16,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:16,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460046753] [2023-01-27 21:16:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:16,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:16,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:16,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460046753] [2023-01-27 21:16:16,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460046753] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:16,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333488860] [2023-01-27 21:16:16,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:16:16,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:16,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:16,435 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:16,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 21:16:16,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:16:16,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:16,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 21:16:16,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:16,631 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:16,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:16,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2023-01-27 21:16:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:16,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:16,735 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:16,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-27 21:16:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:16,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333488860] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:16,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:16,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 14 [2023-01-27 21:16:16,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645906352] [2023-01-27 21:16:16,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:16,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 21:16:16,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 21:16:16,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-01-27 21:16:16,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-01-27 21:16:16,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 172 transitions, 2182 flow. Second operand has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:16,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:16,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-01-27 21:16:16,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:17,198 INFO L130 PetriNetUnfolder]: 802/1441 cut-off events. [2023-01-27 21:16:17,199 INFO L131 PetriNetUnfolder]: For 13951/13951 co-relation queries the response was YES. [2023-01-27 21:16:17,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8558 conditions, 1441 events. 802/1441 cut-off events. For 13951/13951 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7649 event pairs, 217 based on Foata normal form. 2/1443 useless extension candidates. Maximal degree in co-relation 8464. Up to 1285 conditions per place. [2023-01-27 21:16:17,207 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 177 selfloop transitions, 37 changer transitions 3/217 dead transitions. [2023-01-27 21:16:17,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 217 transitions, 2996 flow [2023-01-27 21:16:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 21:16:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 21:16:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1091 transitions. [2023-01-27 21:16:17,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35307443365695795 [2023-01-27 21:16:17,215 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1091 transitions. [2023-01-27 21:16:17,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1091 transitions. [2023-01-27 21:16:17,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:17,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1091 transitions. [2023-01-27 21:16:17,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.73333333333333) internal successors, (1091), 15 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:17,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:17,224 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:17,224 INFO L175 Difference]: Start difference. First operand has 177 places, 172 transitions, 2182 flow. Second operand 15 states and 1091 transitions. [2023-01-27 21:16:17,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 217 transitions, 2996 flow [2023-01-27 21:16:17,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 217 transitions, 2681 flow, removed 143 selfloop flow, removed 9 redundant places. [2023-01-27 21:16:17,260 INFO L231 Difference]: Finished difference. Result has 184 places, 178 transitions, 2162 flow [2023-01-27 21:16:17,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2162, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2023-01-27 21:16:17,261 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 163 predicate places. [2023-01-27 21:16:17,262 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 2162 flow [2023-01-27 21:16:17,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:17,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:17,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:17,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:17,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:17,467 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:17,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2106113381, now seen corresponding path program 22 times [2023-01-27 21:16:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:17,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126190870] [2023-01-27 21:16:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:17,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:17,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:17,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126190870] [2023-01-27 21:16:17,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126190870] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:17,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334800876] [2023-01-27 21:16:17,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:16:17,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:17,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:17,739 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:17,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 21:16:17,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:16:17,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:17,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-27 21:16:17,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:17,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:18,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:18,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-27 21:16:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:18,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334800876] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:18,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:18,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-01-27 21:16:18,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153829336] [2023-01-27 21:16:18,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:18,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:16:18,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:18,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:16:18,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:16:18,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-27 21:16:18,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 2162 flow. Second operand has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:18,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:18,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-27 21:16:18,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:18,375 INFO L130 PetriNetUnfolder]: 842/1510 cut-off events. [2023-01-27 21:16:18,375 INFO L131 PetriNetUnfolder]: For 13580/13580 co-relation queries the response was YES. [2023-01-27 21:16:18,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8763 conditions, 1510 events. 842/1510 cut-off events. For 13580/13580 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8091 event pairs, 223 based on Foata normal form. 1/1511 useless extension candidates. Maximal degree in co-relation 8668. Up to 1408 conditions per place. [2023-01-27 21:16:18,407 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 172 selfloop transitions, 32 changer transitions 1/205 dead transitions. [2023-01-27 21:16:18,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 205 transitions, 2888 flow [2023-01-27 21:16:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:16:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:16:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 776 transitions. [2023-01-27 21:16:18,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3766990291262136 [2023-01-27 21:16:18,408 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 776 transitions. [2023-01-27 21:16:18,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 776 transitions. [2023-01-27 21:16:18,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:18,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 776 transitions. [2023-01-27 21:16:18,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.6) internal successors, (776), 10 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:18,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:18,411 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:18,411 INFO L175 Difference]: Start difference. First operand has 184 places, 178 transitions, 2162 flow. Second operand 10 states and 776 transitions. [2023-01-27 21:16:18,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 205 transitions, 2888 flow [2023-01-27 21:16:18,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 205 transitions, 2671 flow, removed 86 selfloop flow, removed 10 redundant places. [2023-01-27 21:16:18,461 INFO L231 Difference]: Finished difference. Result has 186 places, 187 transitions, 2289 flow [2023-01-27 21:16:18,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2289, PETRI_PLACES=186, PETRI_TRANSITIONS=187} [2023-01-27 21:16:18,462 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2023-01-27 21:16:18,462 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 187 transitions, 2289 flow [2023-01-27 21:16:18,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:18,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:18,462 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:18,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:18,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 21:16:18,666 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:18,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:18,667 INFO L85 PathProgramCache]: Analyzing trace with hash -612048045, now seen corresponding path program 23 times [2023-01-27 21:16:18,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:18,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839200368] [2023-01-27 21:16:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:18,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:18,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:18,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839200368] [2023-01-27 21:16:18,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839200368] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:18,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539458443] [2023-01-27 21:16:18,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:16:18,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:18,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:18,995 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:18,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 21:16:19,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:16:19,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:19,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 21:16:19,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:19,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:19,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:19,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-27 21:16:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:19,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539458443] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:19,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:19,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 14 [2023-01-27 21:16:19,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659414094] [2023-01-27 21:16:19,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:19,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 21:16:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 21:16:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-01-27 21:16:19,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-01-27 21:16:19,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 187 transitions, 2289 flow. Second operand has 16 states, 16 states have (on average 69.1875) internal successors, (1107), 16 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:19,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:19,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-01-27 21:16:19,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:19,709 INFO L130 PetriNetUnfolder]: 864/1549 cut-off events. [2023-01-27 21:16:19,709 INFO L131 PetriNetUnfolder]: For 13315/13315 co-relation queries the response was YES. [2023-01-27 21:16:19,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8872 conditions, 1549 events. 864/1549 cut-off events. For 13315/13315 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8374 event pairs, 257 based on Foata normal form. 1/1550 useless extension candidates. Maximal degree in co-relation 8775. Up to 1473 conditions per place. [2023-01-27 21:16:19,718 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 181 selfloop transitions, 26 changer transitions 1/208 dead transitions. [2023-01-27 21:16:19,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 208 transitions, 2945 flow [2023-01-27 21:16:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:16:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:16:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 722 transitions. [2023-01-27 21:16:19,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3504854368932039 [2023-01-27 21:16:19,719 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 722 transitions. [2023-01-27 21:16:19,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 722 transitions. [2023-01-27 21:16:19,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:19,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 722 transitions. [2023-01-27 21:16:19,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 72.2) internal successors, (722), 10 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:19,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:19,721 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:19,721 INFO L175 Difference]: Start difference. First operand has 186 places, 187 transitions, 2289 flow. Second operand 10 states and 722 transitions. [2023-01-27 21:16:19,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 208 transitions, 2945 flow [2023-01-27 21:16:19,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 208 transitions, 2689 flow, removed 112 selfloop flow, removed 7 redundant places. [2023-01-27 21:16:19,760 INFO L231 Difference]: Finished difference. Result has 191 places, 192 transitions, 2288 flow [2023-01-27 21:16:19,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2288, PETRI_PLACES=191, PETRI_TRANSITIONS=192} [2023-01-27 21:16:19,760 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2023-01-27 21:16:19,760 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 192 transitions, 2288 flow [2023-01-27 21:16:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.1875) internal successors, (1107), 16 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:19,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:19,761 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:19,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:19,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-27 21:16:19,966 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:19,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:19,966 INFO L85 PathProgramCache]: Analyzing trace with hash -554497589, now seen corresponding path program 24 times [2023-01-27 21:16:19,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:19,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078800430] [2023-01-27 21:16:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:19,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:20,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:20,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078800430] [2023-01-27 21:16:20,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078800430] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:20,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598723412] [2023-01-27 21:16:20,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:16:20,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:20,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:20,392 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:20,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 21:16:20,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:16:20,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:20,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-27 21:16:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:20,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:20,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:20,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-27 21:16:20,726 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-27 21:16:20,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-27 21:16:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:20,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598723412] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:20,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:20,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-01-27 21:16:20,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672873350] [2023-01-27 21:16:20,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:20,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:16:20,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:20,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:16:20,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-01-27 21:16:20,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:20,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 192 transitions, 2288 flow. Second operand has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:20,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:20,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:20,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:21,290 INFO L130 PetriNetUnfolder]: 933/1673 cut-off events. [2023-01-27 21:16:21,291 INFO L131 PetriNetUnfolder]: For 16706/16706 co-relation queries the response was YES. [2023-01-27 21:16:21,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9864 conditions, 1673 events. 933/1673 cut-off events. For 16706/16706 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9218 event pairs, 268 based on Foata normal form. 2/1675 useless extension candidates. Maximal degree in co-relation 9765. Up to 1542 conditions per place. [2023-01-27 21:16:21,301 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 203 selfloop transitions, 39 changer transitions 2/244 dead transitions. [2023-01-27 21:16:21,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 244 transitions, 3420 flow [2023-01-27 21:16:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 21:16:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 21:16:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1045 transitions. [2023-01-27 21:16:21,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170509708737864 [2023-01-27 21:16:21,306 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1045 transitions. [2023-01-27 21:16:21,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1045 transitions. [2023-01-27 21:16:21,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:21,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1045 transitions. [2023-01-27 21:16:21,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.3125) internal successors, (1045), 16 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:21,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:21,310 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:21,310 INFO L175 Difference]: Start difference. First operand has 191 places, 192 transitions, 2288 flow. Second operand 16 states and 1045 transitions. [2023-01-27 21:16:21,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 244 transitions, 3420 flow [2023-01-27 21:16:21,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 244 transitions, 3271 flow, removed 57 selfloop flow, removed 7 redundant places. [2023-01-27 21:16:21,350 INFO L231 Difference]: Finished difference. Result has 205 places, 211 transitions, 2754 flow [2023-01-27 21:16:21,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2754, PETRI_PLACES=205, PETRI_TRANSITIONS=211} [2023-01-27 21:16:21,352 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2023-01-27 21:16:21,352 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 211 transitions, 2754 flow [2023-01-27 21:16:21,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:21,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:21,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:21,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:21,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 21:16:21,557 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:21,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:21,557 INFO L85 PathProgramCache]: Analyzing trace with hash -16642011, now seen corresponding path program 25 times [2023-01-27 21:16:21,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:21,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341422133] [2023-01-27 21:16:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:21,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:21,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:21,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341422133] [2023-01-27 21:16:21,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341422133] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:21,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881696562] [2023-01-27 21:16:21,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:16:21,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:21,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:21,995 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:22,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 21:16:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-27 21:16:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:22,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:22,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:22,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-27 21:16:22,436 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-27 21:16:22,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-27 21:16:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:22,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881696562] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:22,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:22,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-01-27 21:16:22,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136501639] [2023-01-27 21:16:22,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:22,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:16:22,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:22,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:16:22,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-01-27 21:16:22,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:22,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 211 transitions, 2754 flow. Second operand has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:22,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:22,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:22,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:23,204 INFO L130 PetriNetUnfolder]: 981/1761 cut-off events. [2023-01-27 21:16:23,204 INFO L131 PetriNetUnfolder]: For 20633/20633 co-relation queries the response was YES. [2023-01-27 21:16:23,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10753 conditions, 1761 events. 981/1761 cut-off events. For 20633/20633 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9804 event pairs, 278 based on Foata normal form. 2/1763 useless extension candidates. Maximal degree in co-relation 10648. Up to 1598 conditions per place. [2023-01-27 21:16:23,215 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 212 selfloop transitions, 45 changer transitions 3/260 dead transitions. [2023-01-27 21:16:23,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 260 transitions, 3733 flow [2023-01-27 21:16:23,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 21:16:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 21:16:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1303 transitions. [2023-01-27 21:16:23,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3162621359223301 [2023-01-27 21:16:23,216 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1303 transitions. [2023-01-27 21:16:23,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1303 transitions. [2023-01-27 21:16:23,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:23,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1303 transitions. [2023-01-27 21:16:23,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.15) internal successors, (1303), 20 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:23,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 206.0) internal successors, (4326), 21 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:23,220 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 206.0) internal successors, (4326), 21 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:23,220 INFO L175 Difference]: Start difference. First operand has 205 places, 211 transitions, 2754 flow. Second operand 20 states and 1303 transitions. [2023-01-27 21:16:23,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 260 transitions, 3733 flow [2023-01-27 21:16:23,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 260 transitions, 3411 flow, removed 151 selfloop flow, removed 6 redundant places. [2023-01-27 21:16:23,272 INFO L231 Difference]: Finished difference. Result has 220 places, 217 transitions, 2788 flow [2023-01-27 21:16:23,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2788, PETRI_PLACES=220, PETRI_TRANSITIONS=217} [2023-01-27 21:16:23,273 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 199 predicate places. [2023-01-27 21:16:23,273 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 217 transitions, 2788 flow [2023-01-27 21:16:23,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:23,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:23,273 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:23,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:23,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:23,478 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:23,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:23,478 INFO L85 PathProgramCache]: Analyzing trace with hash 687923611, now seen corresponding path program 26 times [2023-01-27 21:16:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:23,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687955487] [2023-01-27 21:16:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:23,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:23,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:23,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687955487] [2023-01-27 21:16:23,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687955487] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:23,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806858944] [2023-01-27 21:16:23,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:16:23,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:23,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:23,874 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:23,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 21:16:23,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:16:23,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:23,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-27 21:16:23,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:24,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:24,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:24,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-27 21:16:24,245 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-27 21:16:24,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-27 21:16:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:24,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806858944] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:24,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:24,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-01-27 21:16:24,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085405804] [2023-01-27 21:16:24,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:24,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:16:24,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:24,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:16:24,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-01-27 21:16:24,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:24,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 217 transitions, 2788 flow. Second operand has 24 states, 24 states have (on average 62.083333333333336) internal successors, (1490), 24 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:24,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:24,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:24,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:25,262 INFO L130 PetriNetUnfolder]: 1045/1877 cut-off events. [2023-01-27 21:16:25,262 INFO L131 PetriNetUnfolder]: For 23742/23742 co-relation queries the response was YES. [2023-01-27 21:16:25,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11497 conditions, 1877 events. 1045/1877 cut-off events. For 23742/23742 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10628 event pairs, 303 based on Foata normal form. 2/1879 useless extension candidates. Maximal degree in co-relation 11388. Up to 1706 conditions per place. [2023-01-27 21:16:25,294 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 237 selfloop transitions, 35 changer transitions 3/275 dead transitions. [2023-01-27 21:16:25,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 275 transitions, 3975 flow [2023-01-27 21:16:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:16:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:16:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1117 transitions. [2023-01-27 21:16:25,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3189605939463164 [2023-01-27 21:16:25,296 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1117 transitions. [2023-01-27 21:16:25,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1117 transitions. [2023-01-27 21:16:25,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:25,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1117 transitions. [2023-01-27 21:16:25,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:25,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:25,300 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:25,301 INFO L175 Difference]: Start difference. First operand has 220 places, 217 transitions, 2788 flow. Second operand 17 states and 1117 transitions. [2023-01-27 21:16:25,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 275 transitions, 3975 flow [2023-01-27 21:16:25,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 275 transitions, 3693 flow, removed 110 selfloop flow, removed 14 redundant places. [2023-01-27 21:16:25,401 INFO L231 Difference]: Finished difference. Result has 224 places, 227 transitions, 3000 flow [2023-01-27 21:16:25,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3000, PETRI_PLACES=224, PETRI_TRANSITIONS=227} [2023-01-27 21:16:25,401 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 203 predicate places. [2023-01-27 21:16:25,401 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 227 transitions, 3000 flow [2023-01-27 21:16:25,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.083333333333336) internal successors, (1490), 24 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:25,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:25,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:25,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:25,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:25,608 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:25,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:25,608 INFO L85 PathProgramCache]: Analyzing trace with hash -296912589, now seen corresponding path program 27 times [2023-01-27 21:16:25,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:25,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523037282] [2023-01-27 21:16:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:25,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:26,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523037282] [2023-01-27 21:16:26,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523037282] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057331737] [2023-01-27 21:16:26,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:16:26,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:26,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:26,189 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:26,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-27 21:16:26,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:16:26,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:26,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-27 21:16:26,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:16:26,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 21:16:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:26,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:26,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:26,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 73 [2023-01-27 21:16:26,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:26,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-01-27 21:16:26,776 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:26,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057331737] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:26,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:26,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2023-01-27 21:16:26,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797024257] [2023-01-27 21:16:26,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:26,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 21:16:26,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 21:16:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=757, Unknown=7, NotChecked=0, Total=870 [2023-01-27 21:16:26,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:16:26,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 227 transitions, 3000 flow. Second operand has 30 states, 30 states have (on average 54.6) internal successors, (1638), 30 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:26,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:26,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:16:26,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:27,846 INFO L130 PetriNetUnfolder]: 1107/1990 cut-off events. [2023-01-27 21:16:27,846 INFO L131 PetriNetUnfolder]: For 27625/27625 co-relation queries the response was YES. [2023-01-27 21:16:27,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12380 conditions, 1990 events. 1107/1990 cut-off events. For 27625/27625 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11464 event pairs, 309 based on Foata normal form. 1/1991 useless extension candidates. Maximal degree in co-relation 12268. Up to 1716 conditions per place. [2023-01-27 21:16:27,872 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 208 selfloop transitions, 62 changer transitions 1/271 dead transitions. [2023-01-27 21:16:27,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 271 transitions, 4204 flow [2023-01-27 21:16:27,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 21:16:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 21:16:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 878 transitions. [2023-01-27 21:16:27,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2841423948220065 [2023-01-27 21:16:27,887 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 878 transitions. [2023-01-27 21:16:27,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 878 transitions. [2023-01-27 21:16:27,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:27,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 878 transitions. [2023-01-27 21:16:27,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 58.53333333333333) internal successors, (878), 15 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:27,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:27,890 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:27,890 INFO L175 Difference]: Start difference. First operand has 224 places, 227 transitions, 3000 flow. Second operand 15 states and 878 transitions. [2023-01-27 21:16:27,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 271 transitions, 4204 flow [2023-01-27 21:16:27,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 271 transitions, 3814 flow, removed 177 selfloop flow, removed 10 redundant places. [2023-01-27 21:16:27,964 INFO L231 Difference]: Finished difference. Result has 231 places, 237 transitions, 3197 flow [2023-01-27 21:16:27,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3197, PETRI_PLACES=231, PETRI_TRANSITIONS=237} [2023-01-27 21:16:27,966 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 210 predicate places. [2023-01-27 21:16:27,966 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 237 transitions, 3197 flow [2023-01-27 21:16:27,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 54.6) internal successors, (1638), 30 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:27,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:27,966 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:27,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:28,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:28,173 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:28,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:28,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1732503731, now seen corresponding path program 28 times [2023-01-27 21:16:28,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:28,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039002107] [2023-01-27 21:16:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:28,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:28,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:28,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039002107] [2023-01-27 21:16:28,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039002107] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:28,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619073056] [2023-01-27 21:16:28,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:16:28,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:28,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:28,646 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:28,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-27 21:16:28,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:16:28,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:28,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 92 conjunts are in the unsatisfiable core [2023-01-27 21:16:28,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:28,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:16:28,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:16:28,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:16:28,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 21:16:29,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:29,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-27 21:16:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:29,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:30,362 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_1 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* 4 v_subst_1)))))) (<= c_~N~0 v_subst_1) (< (+ v_subst_1 1) c_~N~0))) (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_2 Int)) (or (< (+ v_subst_2 1) c_~N~0) (<= c_~N~0 v_subst_2) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (< (+ (select .cse2 c_~A~0.offset) (select .cse2 (+ c_~A~0.offset (* 4 v_subst_2)))) (+ (select .cse2 .cse1) c_~counter~0 1))))))) is different from false [2023-01-27 21:16:30,399 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse1 (+ c_~A~0.offset .cse4 4)) (.cse2 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse4)))) (and (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_2 Int)) (or (< (+ v_subst_2 1) c_~N~0) (<= c_~N~0 v_subst_2) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* 4 v_subst_2)))) (+ (select .cse0 .cse1) .cse2 c_~counter~0 1))))) (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_1 Int)) (or (<= c_~N~0 v_subst_1) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (<= (+ (select .cse3 .cse1) .cse2 c_~counter~0) (+ (select .cse3 c_~A~0.offset) (select .cse3 (+ c_~A~0.offset (* 4 v_subst_1)))))) (< (+ v_subst_1 1) c_~N~0)))))) is different from false [2023-01-27 21:16:30,450 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_1 Int)) (or (<= c_~N~0 v_subst_1) (< (+ v_subst_1 1) c_~N~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (<= (+ .cse0 (select .cse1 .cse2) c_~counter~0) (+ (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset (* 4 v_subst_1)))))))) (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_2 Int)) (or (< (+ v_subst_2 1) c_~N~0) (<= c_~N~0 v_subst_2) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (< (+ (select .cse3 c_~A~0.offset) (select .cse3 (+ c_~A~0.offset (* 4 v_subst_2)))) (+ .cse0 (select .cse3 .cse2) c_~counter~0 1))))))) is different from false [2023-01-27 21:16:30,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:30,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 64 [2023-01-27 21:16:30,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:30,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 506 treesize of output 434 [2023-01-27 21:16:30,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:30,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 96 [2023-01-27 21:16:30,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:30,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 47 [2023-01-27 21:16:30,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:30,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 65 [2023-01-27 21:16:30,878 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:30,884 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-01-27 21:16:30,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 88 [2023-01-27 21:16:30,891 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 21:16:30,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2023-01-27 21:16:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-01-27 21:16:30,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619073056] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:30,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:30,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-01-27 21:16:30,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987847837] [2023-01-27 21:16:30,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:30,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-27 21:16:30,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:30,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-27 21:16:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=936, Unknown=3, NotChecked=192, Total=1260 [2023-01-27 21:16:30,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:16:30,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 237 transitions, 3197 flow. Second operand has 36 states, 36 states have (on average 54.55555555555556) internal successors, (1964), 36 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:30,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:30,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:16:30,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:36,801 INFO L130 PetriNetUnfolder]: 1239/2231 cut-off events. [2023-01-27 21:16:36,801 INFO L131 PetriNetUnfolder]: For 30310/30310 co-relation queries the response was YES. [2023-01-27 21:16:36,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13876 conditions, 2231 events. 1239/2231 cut-off events. For 30310/30310 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13059 event pairs, 338 based on Foata normal form. 2/2233 useless extension candidates. Maximal degree in co-relation 13398. Up to 1941 conditions per place. [2023-01-27 21:16:36,816 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 230 selfloop transitions, 112 changer transitions 3/345 dead transitions. [2023-01-27 21:16:36,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 345 transitions, 5143 flow [2023-01-27 21:16:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 21:16:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 21:16:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1609 transitions. [2023-01-27 21:16:36,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2789528432732316 [2023-01-27 21:16:36,826 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1609 transitions. [2023-01-27 21:16:36,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1609 transitions. [2023-01-27 21:16:36,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:36,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1609 transitions. [2023-01-27 21:16:36,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.464285714285715) internal successors, (1609), 28 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:36,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 206.0) internal successors, (5974), 29 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:36,840 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 206.0) internal successors, (5974), 29 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:36,840 INFO L175 Difference]: Start difference. First operand has 231 places, 237 transitions, 3197 flow. Second operand 28 states and 1609 transitions. [2023-01-27 21:16:36,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 345 transitions, 5143 flow [2023-01-27 21:16:36,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 345 transitions, 4545 flow, removed 242 selfloop flow, removed 10 redundant places. [2023-01-27 21:16:36,943 INFO L231 Difference]: Finished difference. Result has 257 places, 299 transitions, 4029 flow [2023-01-27 21:16:36,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4029, PETRI_PLACES=257, PETRI_TRANSITIONS=299} [2023-01-27 21:16:36,944 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2023-01-27 21:16:36,944 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 299 transitions, 4029 flow [2023-01-27 21:16:36,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 54.55555555555556) internal successors, (1964), 36 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:36,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:36,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:36,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:37,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-01-27 21:16:37,153 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:37,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:37,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1655123187, now seen corresponding path program 29 times [2023-01-27 21:16:37,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:37,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263091233] [2023-01-27 21:16:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:37,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:37,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:37,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263091233] [2023-01-27 21:16:37,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263091233] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:37,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545543906] [2023-01-27 21:16:37,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:16:37,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:37,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:37,789 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:37,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-27 21:16:37,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:16:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:37,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-27 21:16:37,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:38,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:38,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:38,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-27 21:16:38,197 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-27 21:16:38,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-27 21:16:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:38,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545543906] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:38,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:38,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 24 [2023-01-27 21:16:38,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253565469] [2023-01-27 21:16:38,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:38,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 21:16:38,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:38,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 21:16:38,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-01-27 21:16:38,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:16:38,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 299 transitions, 4029 flow. Second operand has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:38,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:38,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:16:38,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:38,992 INFO L130 PetriNetUnfolder]: 1287/2319 cut-off events. [2023-01-27 21:16:38,992 INFO L131 PetriNetUnfolder]: For 26591/26591 co-relation queries the response was YES. [2023-01-27 21:16:39,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14804 conditions, 2319 events. 1287/2319 cut-off events. For 26591/26591 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13672 event pairs, 393 based on Foata normal form. 2/2321 useless extension candidates. Maximal degree in co-relation 14494. Up to 2129 conditions per place. [2023-01-27 21:16:39,009 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 285 selfloop transitions, 55 changer transitions 3/343 dead transitions. [2023-01-27 21:16:39,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 343 transitions, 5237 flow [2023-01-27 21:16:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 21:16:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 21:16:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 931 transitions. [2023-01-27 21:16:39,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2824635922330097 [2023-01-27 21:16:39,027 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 931 transitions. [2023-01-27 21:16:39,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 931 transitions. [2023-01-27 21:16:39,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:39,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 931 transitions. [2023-01-27 21:16:39,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.1875) internal successors, (931), 16 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:39,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:39,029 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:39,029 INFO L175 Difference]: Start difference. First operand has 257 places, 299 transitions, 4029 flow. Second operand 16 states and 931 transitions. [2023-01-27 21:16:39,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 343 transitions, 5237 flow [2023-01-27 21:16:39,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 343 transitions, 5162 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-01-27 21:16:39,130 INFO L231 Difference]: Finished difference. Result has 268 places, 305 transitions, 4369 flow [2023-01-27 21:16:39,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=3954, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4369, PETRI_PLACES=268, PETRI_TRANSITIONS=305} [2023-01-27 21:16:39,130 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 247 predicate places. [2023-01-27 21:16:39,130 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 305 transitions, 4369 flow [2023-01-27 21:16:39,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:39,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:39,131 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:39,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:39,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:39,335 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:39,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:39,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1065444320, now seen corresponding path program 30 times [2023-01-27 21:16:39,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:39,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983659250] [2023-01-27 21:16:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:39,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983659250] [2023-01-27 21:16:39,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983659250] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:39,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405165951] [2023-01-27 21:16:39,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:16:39,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:39,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:39,456 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:39,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-27 21:16:39,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:16:39,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:16:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:39,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:39,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405165951] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:39,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:39,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 21:16:39,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128526281] [2023-01-27 21:16:39,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:39,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:16:39,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:16:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:16:39,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:16:39,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 305 transitions, 4369 flow. Second operand has 19 states, 19 states have (on average 77.05263157894737) internal successors, (1464), 19 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:39,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:39,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:16:39,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:40,807 INFO L130 PetriNetUnfolder]: 1964/3502 cut-off events. [2023-01-27 21:16:40,808 INFO L131 PetriNetUnfolder]: For 50367/50390 co-relation queries the response was YES. [2023-01-27 21:16:40,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22566 conditions, 3502 events. 1964/3502 cut-off events. For 50367/50390 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22460 event pairs, 910 based on Foata normal form. 159/3646 useless extension candidates. Maximal degree in co-relation 22251. Up to 2048 conditions per place. [2023-01-27 21:16:40,854 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 389 selfloop transitions, 94 changer transitions 0/500 dead transitions. [2023-01-27 21:16:40,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 500 transitions, 7980 flow [2023-01-27 21:16:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:16:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:16:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 727 transitions. [2023-01-27 21:16:40,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39212513484358147 [2023-01-27 21:16:40,866 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 727 transitions. [2023-01-27 21:16:40,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 727 transitions. [2023-01-27 21:16:40,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:40,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 727 transitions. [2023-01-27 21:16:40,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.77777777777777) internal successors, (727), 9 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:40,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:40,868 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:40,868 INFO L175 Difference]: Start difference. First operand has 268 places, 305 transitions, 4369 flow. Second operand 9 states and 727 transitions. [2023-01-27 21:16:40,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 500 transitions, 7980 flow [2023-01-27 21:16:41,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 500 transitions, 7454 flow, removed 229 selfloop flow, removed 11 redundant places. [2023-01-27 21:16:41,043 INFO L231 Difference]: Finished difference. Result has 267 places, 366 transitions, 5281 flow [2023-01-27 21:16:41,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5281, PETRI_PLACES=267, PETRI_TRANSITIONS=366} [2023-01-27 21:16:41,044 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2023-01-27 21:16:41,044 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 366 transitions, 5281 flow [2023-01-27 21:16:41,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.05263157894737) internal successors, (1464), 19 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:41,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:41,044 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:41,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:41,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:41,249 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:41,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:41,249 INFO L85 PathProgramCache]: Analyzing trace with hash -204995997, now seen corresponding path program 31 times [2023-01-27 21:16:41,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:41,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627043015] [2023-01-27 21:16:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:41,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:41,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:41,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627043015] [2023-01-27 21:16:41,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627043015] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:41,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452936684] [2023-01-27 21:16:41,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:16:41,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:41,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:41,379 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:41,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-27 21:16:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:41,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:16:41,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:41,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:16:41,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452936684] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:41,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:41,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 21:16:41,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755325182] [2023-01-27 21:16:41,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:41,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:16:41,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:16:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:16:41,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:16:41,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 366 transitions, 5281 flow. Second operand has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:41,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:41,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:16:41,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:42,229 INFO L130 PetriNetUnfolder]: 1451/2682 cut-off events. [2023-01-27 21:16:42,229 INFO L131 PetriNetUnfolder]: For 34806/34824 co-relation queries the response was YES. [2023-01-27 21:16:42,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17585 conditions, 2682 events. 1451/2682 cut-off events. For 34806/34824 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17010 event pairs, 390 based on Foata normal form. 154/2820 useless extension candidates. Maximal degree in co-relation 17284. Up to 1037 conditions per place. [2023-01-27 21:16:42,249 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 368 selfloop transitions, 55 changer transitions 0/440 dead transitions. [2023-01-27 21:16:42,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 440 transitions, 7045 flow [2023-01-27 21:16:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:16:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:16:42,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 805 transitions. [2023-01-27 21:16:42,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907766990291262 [2023-01-27 21:16:42,265 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 805 transitions. [2023-01-27 21:16:42,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 805 transitions. [2023-01-27 21:16:42,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:42,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 805 transitions. [2023-01-27 21:16:42,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.5) internal successors, (805), 10 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:42,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:42,267 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:42,267 INFO L175 Difference]: Start difference. First operand has 267 places, 366 transitions, 5281 flow. Second operand 10 states and 805 transitions. [2023-01-27 21:16:42,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 440 transitions, 7045 flow [2023-01-27 21:16:42,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 440 transitions, 6788 flow, removed 125 selfloop flow, removed 4 redundant places. [2023-01-27 21:16:42,400 INFO L231 Difference]: Finished difference. Result has 274 places, 326 transitions, 4627 flow [2023-01-27 21:16:42,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4627, PETRI_PLACES=274, PETRI_TRANSITIONS=326} [2023-01-27 21:16:42,400 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2023-01-27 21:16:42,400 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 326 transitions, 4627 flow [2023-01-27 21:16:42,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:42,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:42,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:42,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:42,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-27 21:16:42,605 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:42,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1422006612, now seen corresponding path program 32 times [2023-01-27 21:16:42,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:42,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186918022] [2023-01-27 21:16:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:42,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:42,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:42,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186918022] [2023-01-27 21:16:42,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186918022] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:42,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390068198] [2023-01-27 21:16:42,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:16:42,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:42,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:42,713 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:42,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-27 21:16:42,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:16:42,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:42,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:16:42,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:42,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:16:42,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390068198] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:42,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:42,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 21:16:42,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9460056] [2023-01-27 21:16:42,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:42,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:16:42,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:42,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:16:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:16:42,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:16:42,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 326 transitions, 4627 flow. Second operand has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:42,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:42,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:16:42,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:43,512 INFO L130 PetriNetUnfolder]: 1170/2263 cut-off events. [2023-01-27 21:16:43,512 INFO L131 PetriNetUnfolder]: For 24607/24618 co-relation queries the response was YES. [2023-01-27 21:16:43,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14586 conditions, 2263 events. 1170/2263 cut-off events. For 24607/24618 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14439 event pairs, 266 based on Foata normal form. 163/2426 useless extension candidates. Maximal degree in co-relation 14260. Up to 835 conditions per place. [2023-01-27 21:16:43,529 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 311 selfloop transitions, 5 changer transitions 113/434 dead transitions. [2023-01-27 21:16:43,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 434 transitions, 6584 flow [2023-01-27 21:16:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:16:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:16:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 804 transitions. [2023-01-27 21:16:43,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39029126213592236 [2023-01-27 21:16:43,530 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 804 transitions. [2023-01-27 21:16:43,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 804 transitions. [2023-01-27 21:16:43,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:43,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 804 transitions. [2023-01-27 21:16:43,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.4) internal successors, (804), 10 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:43,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:43,535 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:43,535 INFO L175 Difference]: Start difference. First operand has 274 places, 326 transitions, 4627 flow. Second operand 10 states and 804 transitions. [2023-01-27 21:16:43,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 434 transitions, 6584 flow [2023-01-27 21:16:43,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 434 transitions, 6187 flow, removed 43 selfloop flow, removed 8 redundant places. [2023-01-27 21:16:43,633 INFO L231 Difference]: Finished difference. Result has 279 places, 246 transitions, 3205 flow [2023-01-27 21:16:43,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3205, PETRI_PLACES=279, PETRI_TRANSITIONS=246} [2023-01-27 21:16:43,634 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 258 predicate places. [2023-01-27 21:16:43,634 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 246 transitions, 3205 flow [2023-01-27 21:16:43,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:43,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:43,635 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:43,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:43,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-27 21:16:43,840 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:43,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:43,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1517944512, now seen corresponding path program 33 times [2023-01-27 21:16:43,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:43,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564694862] [2023-01-27 21:16:43,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:43,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:16:43,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:43,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564694862] [2023-01-27 21:16:43,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564694862] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:43,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889561944] [2023-01-27 21:16:43,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:16:43,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:43,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:43,979 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:43,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-27 21:16:44,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:16:44,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:44,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:16:44,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:16:44,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:16:44,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889561944] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:44,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:44,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 21:16:44,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305279679] [2023-01-27 21:16:44,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:44,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:16:44,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:44,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:16:44,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:16:44,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-27 21:16:44,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 246 transitions, 3205 flow. Second operand has 19 states, 19 states have (on average 76.84210526315789) internal successors, (1460), 19 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:44,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:44,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-27 21:16:44,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:44,554 INFO L130 PetriNetUnfolder]: 668/1171 cut-off events. [2023-01-27 21:16:44,554 INFO L131 PetriNetUnfolder]: For 15837/15840 co-relation queries the response was YES. [2023-01-27 21:16:44,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8475 conditions, 1171 events. 668/1171 cut-off events. For 15837/15840 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5539 event pairs, 191 based on Foata normal form. 121/1292 useless extension candidates. Maximal degree in co-relation 8353. Up to 780 conditions per place. [2023-01-27 21:16:44,563 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 168 selfloop transitions, 90 changer transitions 0/263 dead transitions. [2023-01-27 21:16:44,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 263 transitions, 4019 flow [2023-01-27 21:16:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:16:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:16:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2023-01-27 21:16:44,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38457389428263217 [2023-01-27 21:16:44,564 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 713 transitions. [2023-01-27 21:16:44,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 713 transitions. [2023-01-27 21:16:44,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:44,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 713 transitions. [2023-01-27 21:16:44,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.22222222222223) internal successors, (713), 9 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:44,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:44,566 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:44,566 INFO L175 Difference]: Start difference. First operand has 279 places, 246 transitions, 3205 flow. Second operand 9 states and 713 transitions. [2023-01-27 21:16:44,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 263 transitions, 4019 flow [2023-01-27 21:16:44,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 263 transitions, 3373 flow, removed 226 selfloop flow, removed 35 redundant places. [2023-01-27 21:16:44,634 INFO L231 Difference]: Finished difference. Result has 234 places, 248 transitions, 2902 flow [2023-01-27 21:16:44,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2902, PETRI_PLACES=234, PETRI_TRANSITIONS=248} [2023-01-27 21:16:44,634 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2023-01-27 21:16:44,634 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 248 transitions, 2902 flow [2023-01-27 21:16:44,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 76.84210526315789) internal successors, (1460), 19 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:44,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:44,635 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:44,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:44,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-27 21:16:44,840 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:44,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:44,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1248224389, now seen corresponding path program 34 times [2023-01-27 21:16:44,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:44,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053667723] [2023-01-27 21:16:44,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:44,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:45,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:45,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053667723] [2023-01-27 21:16:45,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053667723] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:45,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30489493] [2023-01-27 21:16:45,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:16:45,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:45,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:45,528 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:45,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-27 21:16:45,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:16:45,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:45,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-01-27 21:16:45,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:16:45,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-27 21:16:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:16:46,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:46,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-27 21:16:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:46,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:46,795 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_3 Int)) (or (<= c_~N~0 (+ v_subst_3 1)) (< (+ 2 v_subst_3) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0) (let ((.cse2 (* 4 v_subst_3))) (+ (select .cse0 (+ c_~A~0.offset .cse2)) (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset .cse2 4)))))))) (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_4 Int)) (or (<= c_~N~0 (+ v_subst_4 1)) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (< (let ((.cse4 (* 4 v_subst_4))) (+ (select .cse3 (+ c_~A~0.offset .cse4)) (select .cse3 (+ c_~A~0.offset .cse4 4)) (select .cse3 c_~A~0.offset))) (+ (select .cse3 .cse1) c_~counter~0 1))) (< (+ 2 v_subst_4) c_~N~0))))) is different from false [2023-01-27 21:16:46,821 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_3 Int)) (or (<= c_~N~0 (+ v_subst_3 1)) (< (+ 2 v_subst_3) c_~N~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (<= (+ .cse0 c_~counter~0 (select .cse1 .cse2)) (let ((.cse3 (* 4 v_subst_3))) (+ (select .cse1 (+ c_~A~0.offset .cse3)) (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset .cse3 4)))))))) (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_4 Int)) (or (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (< (let ((.cse5 (* 4 v_subst_4))) (+ (select .cse4 (+ c_~A~0.offset .cse5)) (select .cse4 (+ c_~A~0.offset .cse5 4)) (select .cse4 c_~A~0.offset))) (+ .cse0 c_~counter~0 (select .cse4 .cse2) 1))) (<= c_~N~0 (+ v_subst_4 1)) (< (+ 2 v_subst_4) c_~N~0)))))) is different from false [2023-01-27 21:16:46,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:46,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 154 [2023-01-27 21:16:46,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:46,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 63 [2023-01-27 21:16:47,565 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:47,619 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-27 21:16:47,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-01-27 21:16:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-01-27 21:16:47,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30489493] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:47,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:47,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-27 21:16:47,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777648755] [2023-01-27 21:16:47,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:47,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-27 21:16:47,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:47,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-27 21:16:47,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1639, Unknown=2, NotChecked=166, Total=1980 [2023-01-27 21:16:47,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-01-27 21:16:47,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 248 transitions, 2902 flow. Second operand has 45 states, 45 states have (on average 57.355555555555554) internal successors, (2581), 45 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:47,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:47,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-01-27 21:16:47,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:49,817 INFO L130 PetriNetUnfolder]: 924/1680 cut-off events. [2023-01-27 21:16:49,817 INFO L131 PetriNetUnfolder]: For 25949/25949 co-relation queries the response was YES. [2023-01-27 21:16:49,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12552 conditions, 1680 events. 924/1680 cut-off events. For 25949/25949 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9015 event pairs, 36 based on Foata normal form. 2/1682 useless extension candidates. Maximal degree in co-relation 12262. Up to 965 conditions per place. [2023-01-27 21:16:49,852 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 267 selfloop transitions, 197 changer transitions 9/473 dead transitions. [2023-01-27 21:16:49,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 473 transitions, 6648 flow [2023-01-27 21:16:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-27 21:16:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-27 21:16:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2669 transitions. [2023-01-27 21:16:49,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2944616063548102 [2023-01-27 21:16:49,854 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2669 transitions. [2023-01-27 21:16:49,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2669 transitions. [2023-01-27 21:16:49,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:49,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2669 transitions. [2023-01-27 21:16:49,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 60.65909090909091) internal successors, (2669), 44 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:49,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:49,861 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:49,861 INFO L175 Difference]: Start difference. First operand has 234 places, 248 transitions, 2902 flow. Second operand 44 states and 2669 transitions. [2023-01-27 21:16:49,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 473 transitions, 6648 flow [2023-01-27 21:16:49,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 473 transitions, 6386 flow, removed 37 selfloop flow, removed 7 redundant places. [2023-01-27 21:16:49,978 INFO L231 Difference]: Finished difference. Result has 278 places, 371 transitions, 5578 flow [2023-01-27 21:16:49,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5578, PETRI_PLACES=278, PETRI_TRANSITIONS=371} [2023-01-27 21:16:49,979 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-01-27 21:16:49,979 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 371 transitions, 5578 flow [2023-01-27 21:16:49,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 57.355555555555554) internal successors, (2581), 45 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:49,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:49,980 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:49,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:50,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-27 21:16:50,187 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:50,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:50,187 INFO L85 PathProgramCache]: Analyzing trace with hash -564186213, now seen corresponding path program 35 times [2023-01-27 21:16:50,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:50,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035073136] [2023-01-27 21:16:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:50,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:50,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:50,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035073136] [2023-01-27 21:16:50,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035073136] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:50,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487636030] [2023-01-27 21:16:50,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:16:50,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:50,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:50,919 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:50,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-27 21:16:51,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:16:51,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:51,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-27 21:16:51,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:51,246 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:51,247 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:51,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:51,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2023-01-27 21:16:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:16:51,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:51,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:51,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-27 21:16:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:16:51,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487636030] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:51,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:51,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 29 [2023-01-27 21:16:51,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544217249] [2023-01-27 21:16:51,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:51,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 21:16:51,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 21:16:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2023-01-27 21:16:51,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:16:51,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 371 transitions, 5578 flow. Second operand has 31 states, 31 states have (on average 54.806451612903224) internal successors, (1699), 31 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:51,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:51,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:16:51,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:52,414 INFO L130 PetriNetUnfolder]: 1004/1816 cut-off events. [2023-01-27 21:16:52,414 INFO L131 PetriNetUnfolder]: For 32473/32473 co-relation queries the response was YES. [2023-01-27 21:16:52,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14495 conditions, 1816 events. 1004/1816 cut-off events. For 32473/32473 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9859 event pairs, 168 based on Foata normal form. 1/1817 useless extension candidates. Maximal degree in co-relation 14367. Up to 1500 conditions per place. [2023-01-27 21:16:52,427 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 304 selfloop transitions, 138 changer transitions 1/443 dead transitions. [2023-01-27 21:16:52,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 443 transitions, 7344 flow [2023-01-27 21:16:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 21:16:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 21:16:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1431 transitions. [2023-01-27 21:16:52,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2778640776699029 [2023-01-27 21:16:52,429 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1431 transitions. [2023-01-27 21:16:52,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1431 transitions. [2023-01-27 21:16:52,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:52,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1431 transitions. [2023-01-27 21:16:52,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.24) internal successors, (1431), 25 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:52,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:52,435 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:52,435 INFO L175 Difference]: Start difference. First operand has 278 places, 371 transitions, 5578 flow. Second operand 25 states and 1431 transitions. [2023-01-27 21:16:52,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 443 transitions, 7344 flow [2023-01-27 21:16:52,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 443 transitions, 6309 flow, removed 462 selfloop flow, removed 15 redundant places. [2023-01-27 21:16:52,536 INFO L231 Difference]: Finished difference. Result has 294 places, 406 transitions, 5650 flow [2023-01-27 21:16:52,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5650, PETRI_PLACES=294, PETRI_TRANSITIONS=406} [2023-01-27 21:16:52,536 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2023-01-27 21:16:52,536 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 406 transitions, 5650 flow [2023-01-27 21:16:52,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 54.806451612903224) internal successors, (1699), 31 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:52,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:52,537 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:52,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:52,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-27 21:16:52,742 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:52,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:52,743 INFO L85 PathProgramCache]: Analyzing trace with hash 966993389, now seen corresponding path program 36 times [2023-01-27 21:16:52,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:52,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921860577] [2023-01-27 21:16:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:52,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:53,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:53,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921860577] [2023-01-27 21:16:53,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921860577] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:53,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935022770] [2023-01-27 21:16:53,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:16:53,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:53,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:53,361 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:53,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-27 21:16:53,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:16:53,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:53,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-27 21:16:53,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:53,656 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:53,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:16:53,658 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:16:53,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:53,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2023-01-27 21:16:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:16:53,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:53,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:53,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-27 21:16:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:16:54,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935022770] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:54,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:54,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 29 [2023-01-27 21:16:54,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221774809] [2023-01-27 21:16:54,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:54,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 21:16:54,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 21:16:54,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2023-01-27 21:16:54,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:54,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 406 transitions, 5650 flow. Second operand has 31 states, 31 states have (on average 61.87096774193548) internal successors, (1918), 31 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:54,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:54,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:54,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:55,330 INFO L130 PetriNetUnfolder]: 1087/1965 cut-off events. [2023-01-27 21:16:55,330 INFO L131 PetriNetUnfolder]: For 27325/27325 co-relation queries the response was YES. [2023-01-27 21:16:55,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14919 conditions, 1965 events. 1087/1965 cut-off events. For 27325/27325 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10921 event pairs, 168 based on Foata normal form. 2/1967 useless extension candidates. Maximal degree in co-relation 14797. Up to 1595 conditions per place. [2023-01-27 21:16:55,342 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 327 selfloop transitions, 154 changer transitions 2/483 dead transitions. [2023-01-27 21:16:55,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 483 transitions, 7729 flow [2023-01-27 21:16:55,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 21:16:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 21:16:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1936 transitions. [2023-01-27 21:16:55,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3132686084142395 [2023-01-27 21:16:55,344 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1936 transitions. [2023-01-27 21:16:55,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1936 transitions. [2023-01-27 21:16:55,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:55,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1936 transitions. [2023-01-27 21:16:55,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.53333333333333) internal successors, (1936), 30 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:55,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:55,349 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:55,349 INFO L175 Difference]: Start difference. First operand has 294 places, 406 transitions, 5650 flow. Second operand 30 states and 1936 transitions. [2023-01-27 21:16:55,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 483 transitions, 7729 flow [2023-01-27 21:16:55,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 483 transitions, 7275 flow, removed 169 selfloop flow, removed 12 redundant places. [2023-01-27 21:16:55,433 INFO L231 Difference]: Finished difference. Result has 316 places, 431 transitions, 6443 flow [2023-01-27 21:16:55,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6443, PETRI_PLACES=316, PETRI_TRANSITIONS=431} [2023-01-27 21:16:55,434 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 295 predicate places. [2023-01-27 21:16:55,434 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 431 transitions, 6443 flow [2023-01-27 21:16:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 61.87096774193548) internal successors, (1918), 31 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:55,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:55,434 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:55,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:55,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-01-27 21:16:55,639 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:55,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:55,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1143816677, now seen corresponding path program 37 times [2023-01-27 21:16:55,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:55,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46581502] [2023-01-27 21:16:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:55,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:56,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46581502] [2023-01-27 21:16:56,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46581502] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820928694] [2023-01-27 21:16:56,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:16:56,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:56,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:56,209 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:56,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-27 21:16:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:56,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-27 21:16:56,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:16:56,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:16:56,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:56,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-27 21:16:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:16:56,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820928694] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:16:56,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:16:56,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-01-27 21:16:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634547515] [2023-01-27 21:16:56,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:16:56,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 21:16:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:16:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 21:16:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-01-27 21:16:56,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:16:56,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 431 transitions, 6443 flow. Second operand has 32 states, 32 states have (on average 61.84375) internal successors, (1979), 32 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:56,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:16:56,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:16:56,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:16:58,173 INFO L130 PetriNetUnfolder]: 1211/2202 cut-off events. [2023-01-27 21:16:58,174 INFO L131 PetriNetUnfolder]: For 40025/40025 co-relation queries the response was YES. [2023-01-27 21:16:58,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17834 conditions, 2202 events. 1211/2202 cut-off events. For 40025/40025 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12532 event pairs, 197 based on Foata normal form. 3/2205 useless extension candidates. Maximal degree in co-relation 17707. Up to 1636 conditions per place. [2023-01-27 21:16:58,192 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 335 selfloop transitions, 192 changer transitions 4/531 dead transitions. [2023-01-27 21:16:58,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 531 transitions, 9164 flow [2023-01-27 21:16:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 21:16:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 21:16:58,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1894 transitions. [2023-01-27 21:16:58,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170405088717777 [2023-01-27 21:16:58,195 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1894 transitions. [2023-01-27 21:16:58,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1894 transitions. [2023-01-27 21:16:58,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:16:58,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1894 transitions. [2023-01-27 21:16:58,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.3103448275862) internal successors, (1894), 29 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:58,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:58,224 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:58,225 INFO L175 Difference]: Start difference. First operand has 316 places, 431 transitions, 6443 flow. Second operand 29 states and 1894 transitions. [2023-01-27 21:16:58,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 531 transitions, 9164 flow [2023-01-27 21:16:58,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 531 transitions, 8352 flow, removed 321 selfloop flow, removed 17 redundant places. [2023-01-27 21:16:58,342 INFO L231 Difference]: Finished difference. Result has 333 places, 462 transitions, 7408 flow [2023-01-27 21:16:58,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7408, PETRI_PLACES=333, PETRI_TRANSITIONS=462} [2023-01-27 21:16:58,343 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 312 predicate places. [2023-01-27 21:16:58,343 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 462 transitions, 7408 flow [2023-01-27 21:16:58,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 61.84375) internal successors, (1979), 32 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:16:58,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:16:58,343 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:16:58,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-27 21:16:58,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-01-27 21:16:58,548 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:16:58,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:16:58,548 INFO L85 PathProgramCache]: Analyzing trace with hash 289376107, now seen corresponding path program 38 times [2023-01-27 21:16:58,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:16:58,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685146311] [2023-01-27 21:16:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:16:58,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:16:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:16:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:59,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:16:59,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685146311] [2023-01-27 21:16:59,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685146311] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:16:59,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541040961] [2023-01-27 21:16:59,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:16:59,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:16:59,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:16:59,186 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:16:59,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-27 21:16:59,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:16:59,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:16:59,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-01-27 21:16:59,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:16:59,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:16:59,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2023-01-27 21:16:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:16:59,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:00,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:17:00,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 104 [2023-01-27 21:17:00,469 INFO L321 Elim1Store]: treesize reduction 80, result has 14.0 percent of original size [2023-01-27 21:17:00,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 23 [2023-01-27 21:17:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:00,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541040961] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:00,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:00,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2023-01-27 21:17:00,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107704779] [2023-01-27 21:17:00,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:00,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-27 21:17:00,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-27 21:17:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2023-01-27 21:17:00,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:17:00,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 462 transitions, 7408 flow. Second operand has 34 states, 34 states have (on average 61.411764705882355) internal successors, (2088), 34 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:00,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:00,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:17:00,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:01,705 INFO L130 PetriNetUnfolder]: 1253/2280 cut-off events. [2023-01-27 21:17:01,706 INFO L131 PetriNetUnfolder]: For 41516/41516 co-relation queries the response was YES. [2023-01-27 21:17:01,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18203 conditions, 2280 events. 1253/2280 cut-off events. For 41516/41516 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13073 event pairs, 231 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 18070. Up to 1846 conditions per place. [2023-01-27 21:17:01,722 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 315 selfloop transitions, 193 changer transitions 2/510 dead transitions. [2023-01-27 21:17:01,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 510 transitions, 9143 flow [2023-01-27 21:17:01,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 21:17:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 21:17:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1604 transitions. [2023-01-27 21:17:01,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31145631067961166 [2023-01-27 21:17:01,724 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1604 transitions. [2023-01-27 21:17:01,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1604 transitions. [2023-01-27 21:17:01,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:01,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1604 transitions. [2023-01-27 21:17:01,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.16) internal successors, (1604), 25 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:01,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:01,728 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:01,728 INFO L175 Difference]: Start difference. First operand has 333 places, 462 transitions, 7408 flow. Second operand 25 states and 1604 transitions. [2023-01-27 21:17:01,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 510 transitions, 9143 flow [2023-01-27 21:17:01,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 510 transitions, 8167 flow, removed 400 selfloop flow, removed 20 redundant places. [2023-01-27 21:17:01,846 INFO L231 Difference]: Finished difference. Result has 339 places, 478 transitions, 7393 flow [2023-01-27 21:17:01,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=6474, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7393, PETRI_PLACES=339, PETRI_TRANSITIONS=478} [2023-01-27 21:17:01,846 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 318 predicate places. [2023-01-27 21:17:01,846 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 478 transitions, 7393 flow [2023-01-27 21:17:01,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.411764705882355) internal successors, (2088), 34 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:01,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:01,847 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:01,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-27 21:17:02,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-01-27 21:17:02,051 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:17:02,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1083728057, now seen corresponding path program 39 times [2023-01-27 21:17:02,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:02,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265168791] [2023-01-27 21:17:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:02,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:02,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:02,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265168791] [2023-01-27 21:17:02,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265168791] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:02,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289398945] [2023-01-27 21:17:02,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:17:02,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:02,912 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:17:02,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-27 21:17:03,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:17:03,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:17:03,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 106 conjunts are in the unsatisfiable core [2023-01-27 21:17:03,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:03,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:17:03,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-27 21:17:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:17:03,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:04,508 INFO L321 Elim1Store]: treesize reduction 38, result has 65.8 percent of original size [2023-01-27 21:17:04,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 83 [2023-01-27 21:17:04,589 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 21:17:04,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2023-01-27 21:17:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:17:04,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289398945] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:04,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:04,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-01-27 21:17:04,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286728844] [2023-01-27 21:17:04,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:04,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-27 21:17:04,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:04,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-27 21:17:04,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2023-01-27 21:17:04,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:17:04,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 478 transitions, 7393 flow. Second operand has 39 states, 39 states have (on average 54.61538461538461) internal successors, (2130), 39 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:04,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:04,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:17:04,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:07,463 INFO L130 PetriNetUnfolder]: 1328/2430 cut-off events. [2023-01-27 21:17:07,464 INFO L131 PetriNetUnfolder]: For 43014/43014 co-relation queries the response was YES. [2023-01-27 21:17:07,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19039 conditions, 2430 events. 1328/2430 cut-off events. For 43014/43014 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14268 event pairs, 216 based on Foata normal form. 2/2432 useless extension candidates. Maximal degree in co-relation 18904. Up to 1958 conditions per place. [2023-01-27 21:17:07,484 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 366 selfloop transitions, 184 changer transitions 6/556 dead transitions. [2023-01-27 21:17:07,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 556 transitions, 9584 flow [2023-01-27 21:17:07,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 21:17:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 21:17:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1996 transitions. [2023-01-27 21:17:07,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2768377253814147 [2023-01-27 21:17:07,493 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1996 transitions. [2023-01-27 21:17:07,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1996 transitions. [2023-01-27 21:17:07,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:07,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1996 transitions. [2023-01-27 21:17:07,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.02857142857143) internal successors, (1996), 35 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:07,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:07,513 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:07,513 INFO L175 Difference]: Start difference. First operand has 339 places, 478 transitions, 7393 flow. Second operand 35 states and 1996 transitions. [2023-01-27 21:17:07,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 556 transitions, 9584 flow [2023-01-27 21:17:07,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 556 transitions, 8982 flow, removed 190 selfloop flow, removed 19 redundant places. [2023-01-27 21:17:07,640 INFO L231 Difference]: Finished difference. Result has 360 places, 501 transitions, 8067 flow [2023-01-27 21:17:07,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8067, PETRI_PLACES=360, PETRI_TRANSITIONS=501} [2023-01-27 21:17:07,640 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 339 predicate places. [2023-01-27 21:17:07,640 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 501 transitions, 8067 flow [2023-01-27 21:17:07,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.61538461538461) internal successors, (2130), 39 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:07,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:07,641 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:07,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-01-27 21:17:07,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:07,846 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:17:07,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:07,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1010617733, now seen corresponding path program 40 times [2023-01-27 21:17:07,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:07,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095299772] [2023-01-27 21:17:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:07,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:08,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:08,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095299772] [2023-01-27 21:17:08,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095299772] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:08,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828139387] [2023-01-27 21:17:08,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:17:08,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:08,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:08,509 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:17:08,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-27 21:17:08,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:17:08,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:17:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-27 21:17:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:08,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:17:08,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-27 21:17:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:09,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:09,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:17:09,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 104 [2023-01-27 21:17:09,799 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-01-27 21:17:09,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-01-27 21:17:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:10,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828139387] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:10,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:10,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-01-27 21:17:10,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117851177] [2023-01-27 21:17:10,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:10,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-27 21:17:10,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:10,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-27 21:17:10,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2023-01-27 21:17:10,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:17:10,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 501 transitions, 8067 flow. Second operand has 41 states, 41 states have (on average 61.41463414634146) internal successors, (2518), 41 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:10,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:10,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:17:10,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:11,566 INFO L130 PetriNetUnfolder]: 1481/2703 cut-off events. [2023-01-27 21:17:11,566 INFO L131 PetriNetUnfolder]: For 52388/52388 co-relation queries the response was YES. [2023-01-27 21:17:11,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22669 conditions, 2703 events. 1481/2703 cut-off events. For 52388/52388 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16375 event pairs, 254 based on Foata normal form. 4/2707 useless extension candidates. Maximal degree in co-relation 22528. Up to 2220 conditions per place. [2023-01-27 21:17:11,593 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 402 selfloop transitions, 223 changer transitions 4/629 dead transitions. [2023-01-27 21:17:11,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 629 transitions, 11551 flow [2023-01-27 21:17:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 21:17:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 21:17:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2063 transitions. [2023-01-27 21:17:11,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3129550970873786 [2023-01-27 21:17:11,595 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2063 transitions. [2023-01-27 21:17:11,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2063 transitions. [2023-01-27 21:17:11,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:11,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2063 transitions. [2023-01-27 21:17:11,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 64.46875) internal successors, (2063), 32 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:11,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:11,600 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:11,600 INFO L175 Difference]: Start difference. First operand has 360 places, 501 transitions, 8067 flow. Second operand 32 states and 2063 transitions. [2023-01-27 21:17:11,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 629 transitions, 11551 flow [2023-01-27 21:17:11,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 629 transitions, 10632 flow, removed 323 selfloop flow, removed 27 redundant places. [2023-01-27 21:17:11,793 INFO L231 Difference]: Finished difference. Result has 365 places, 574 transitions, 9506 flow [2023-01-27 21:17:11,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=7182, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9506, PETRI_PLACES=365, PETRI_TRANSITIONS=574} [2023-01-27 21:17:11,794 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 344 predicate places. [2023-01-27 21:17:11,794 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 574 transitions, 9506 flow [2023-01-27 21:17:11,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 61.41463414634146) internal successors, (2518), 41 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:11,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:11,794 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:11,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-01-27 21:17:11,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:11,999 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:17:11,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:11,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1638284751, now seen corresponding path program 41 times [2023-01-27 21:17:11,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:11,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111145005] [2023-01-27 21:17:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:11,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:12,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:12,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111145005] [2023-01-27 21:17:12,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111145005] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:12,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308210619] [2023-01-27 21:17:12,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:17:12,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:12,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:12,741 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:17:12,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-27 21:17:12,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:17:12,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:17:12,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-27 21:17:12,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:17:13,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:13,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:17:13,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-27 21:17:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:17:13,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308210619] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:13,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:13,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-27 21:17:13,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528999644] [2023-01-27 21:17:13,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:13,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 21:17:13,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:13,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 21:17:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 21:17:13,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:17:13,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 574 transitions, 9506 flow. Second operand has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:13,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:13,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:17:13,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:15,384 INFO L130 PetriNetUnfolder]: 1579/2895 cut-off events. [2023-01-27 21:17:15,385 INFO L131 PetriNetUnfolder]: For 64997/64997 co-relation queries the response was YES. [2023-01-27 21:17:15,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25125 conditions, 2895 events. 1579/2895 cut-off events. For 64997/64997 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17933 event pairs, 289 based on Foata normal form. 2/2897 useless extension candidates. Maximal degree in co-relation 24985. Up to 2350 conditions per place. [2023-01-27 21:17:15,407 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 442 selfloop transitions, 212 changer transitions 2/656 dead transitions. [2023-01-27 21:17:15,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 656 transitions, 12492 flow [2023-01-27 21:17:15,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 21:17:15,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 21:17:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1843 transitions. [2023-01-27 21:17:15,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27958131067961167 [2023-01-27 21:17:15,409 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1843 transitions. [2023-01-27 21:17:15,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1843 transitions. [2023-01-27 21:17:15,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:15,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1843 transitions. [2023-01-27 21:17:15,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.59375) internal successors, (1843), 32 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:15,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:15,414 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:15,414 INFO L175 Difference]: Start difference. First operand has 365 places, 574 transitions, 9506 flow. Second operand 32 states and 1843 transitions. [2023-01-27 21:17:15,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 656 transitions, 12492 flow [2023-01-27 21:17:15,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 656 transitions, 12013 flow, removed 204 selfloop flow, removed 14 redundant places. [2023-01-27 21:17:15,633 INFO L231 Difference]: Finished difference. Result has 386 places, 594 transitions, 10656 flow [2023-01-27 21:17:15,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=9027, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10656, PETRI_PLACES=386, PETRI_TRANSITIONS=594} [2023-01-27 21:17:15,634 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 365 predicate places. [2023-01-27 21:17:15,634 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 594 transitions, 10656 flow [2023-01-27 21:17:15,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:15,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:15,634 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:15,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-27 21:17:15,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-01-27 21:17:15,857 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:17:15,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:15,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1223489761, now seen corresponding path program 42 times [2023-01-27 21:17:15,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:15,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395800527] [2023-01-27 21:17:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:15,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:16,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:16,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395800527] [2023-01-27 21:17:16,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395800527] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:16,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761193733] [2023-01-27 21:17:16,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:17:16,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:16,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:16,727 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:17:16,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-27 21:17:16,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:17:16,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:17:16,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-27 21:17:16,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:17,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:17:17,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:17:17,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-27 21:17:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:17,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:17,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:17:17,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 103 [2023-01-27 21:17:18,142 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-01-27 21:17:18,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 60 [2023-01-27 21:17:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:18,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761193733] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:18,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:18,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-01-27 21:17:18,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890306486] [2023-01-27 21:17:18,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:18,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-27 21:17:18,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:18,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-27 21:17:18,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2023-01-27 21:17:18,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:17:18,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 594 transitions, 10656 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:18,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:18,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:17:18,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:20,640 INFO L130 PetriNetUnfolder]: 1879/3601 cut-off events. [2023-01-27 21:17:20,640 INFO L131 PetriNetUnfolder]: For 83662/83662 co-relation queries the response was YES. [2023-01-27 21:17:20,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30501 conditions, 3601 events. 1879/3601 cut-off events. For 83662/83662 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24637 event pairs, 15 based on Foata normal form. 4/3605 useless extension candidates. Maximal degree in co-relation 30356. Up to 1671 conditions per place. [2023-01-27 21:17:20,670 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 421 selfloop transitions, 365 changer transitions 6/792 dead transitions. [2023-01-27 21:17:20,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 792 transitions, 15469 flow [2023-01-27 21:17:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 21:17:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 21:17:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1963 transitions. [2023-01-27 21:17:20,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2802684180468304 [2023-01-27 21:17:20,672 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1963 transitions. [2023-01-27 21:17:20,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1963 transitions. [2023-01-27 21:17:20,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:20,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1963 transitions. [2023-01-27 21:17:20,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.73529411764706) internal successors, (1963), 34 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:20,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:20,677 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:20,677 INFO L175 Difference]: Start difference. First operand has 386 places, 594 transitions, 10656 flow. Second operand 34 states and 1963 transitions. [2023-01-27 21:17:20,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 792 transitions, 15469 flow [2023-01-27 21:17:20,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 792 transitions, 13410 flow, removed 940 selfloop flow, removed 21 redundant places. [2023-01-27 21:17:20,925 INFO L231 Difference]: Finished difference. Result has 401 places, 722 transitions, 12249 flow [2023-01-27 21:17:20,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=9534, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12249, PETRI_PLACES=401, PETRI_TRANSITIONS=722} [2023-01-27 21:17:20,925 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 380 predicate places. [2023-01-27 21:17:20,925 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 722 transitions, 12249 flow [2023-01-27 21:17:20,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:20,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:20,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:20,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-01-27 21:17:21,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-01-27 21:17:21,130 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:17:21,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1882185715, now seen corresponding path program 43 times [2023-01-27 21:17:21,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:21,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602571724] [2023-01-27 21:17:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:21,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:21,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:21,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602571724] [2023-01-27 21:17:21,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602571724] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:21,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484081446] [2023-01-27 21:17:21,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:17:21,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:21,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:21,661 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:17:21,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-27 21:17:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:21,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-27 21:17:21,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:17:22,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:22,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:17:22,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-27 21:17:22,303 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-27 21:17:22,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-27 21:17:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:17:22,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484081446] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:22,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:22,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-01-27 21:17:22,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799609030] [2023-01-27 21:17:22,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:22,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-27 21:17:22,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:22,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-27 21:17:22,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2023-01-27 21:17:22,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:17:22,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 722 transitions, 12249 flow. Second operand has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:22,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:22,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:17:22,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:24,640 INFO L130 PetriNetUnfolder]: 2233/4306 cut-off events. [2023-01-27 21:17:24,641 INFO L131 PetriNetUnfolder]: For 127505/127505 co-relation queries the response was YES. [2023-01-27 21:17:24,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39066 conditions, 4306 events. 2233/4306 cut-off events. For 127505/127505 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30575 event pairs, 383 based on Foata normal form. 7/4313 useless extension candidates. Maximal degree in co-relation 38917. Up to 3482 conditions per place. [2023-01-27 21:17:24,687 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 700 selfloop transitions, 217 changer transitions 11/928 dead transitions. [2023-01-27 21:17:24,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 928 transitions, 19470 flow [2023-01-27 21:17:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 21:17:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 21:17:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2291 transitions. [2023-01-27 21:17:24,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.317753120665742 [2023-01-27 21:17:24,702 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2291 transitions. [2023-01-27 21:17:24,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2291 transitions. [2023-01-27 21:17:24,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:24,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2291 transitions. [2023-01-27 21:17:24,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 65.45714285714286) internal successors, (2291), 35 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:24,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:24,707 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:24,707 INFO L175 Difference]: Start difference. First operand has 401 places, 722 transitions, 12249 flow. Second operand 35 states and 2291 transitions. [2023-01-27 21:17:24,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 928 transitions, 19470 flow [2023-01-27 21:17:25,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 928 transitions, 18660 flow, removed 368 selfloop flow, removed 17 redundant places. [2023-01-27 21:17:25,253 INFO L231 Difference]: Finished difference. Result has 427 places, 817 transitions, 16330 flow [2023-01-27 21:17:25,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=11881, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16330, PETRI_PLACES=427, PETRI_TRANSITIONS=817} [2023-01-27 21:17:25,253 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 406 predicate places. [2023-01-27 21:17:25,254 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 817 transitions, 16330 flow [2023-01-27 21:17:25,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:25,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:25,254 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:25,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-27 21:17:25,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-27 21:17:25,459 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:17:25,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:25,460 INFO L85 PathProgramCache]: Analyzing trace with hash 379627409, now seen corresponding path program 44 times [2023-01-27 21:17:25,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:25,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885345951] [2023-01-27 21:17:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:25,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:26,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:26,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885345951] [2023-01-27 21:17:26,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885345951] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:26,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560413318] [2023-01-27 21:17:26,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:17:26,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:26,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:26,205 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:17:26,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-27 21:17:26,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:17:26,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:17:26,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-01-27 21:17:26,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:26,647 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:17:26,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:17:26,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2023-01-27 21:17:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:26,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:26,989 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-01-27 21:17:26,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 95 [2023-01-27 21:17:27,192 INFO L321 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-01-27 21:17:27,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 24 [2023-01-27 21:17:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560413318] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:27,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:27,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2023-01-27 21:17:27,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262175346] [2023-01-27 21:17:27,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:27,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-27 21:17:27,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-27 21:17:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2023-01-27 21:17:27,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:17:27,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 817 transitions, 16330 flow. Second operand has 41 states, 41 states have (on average 54.41463414634146) internal successors, (2231), 41 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:27,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:27,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:17:27,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:17:48,524 INFO L130 PetriNetUnfolder]: 3219/5857 cut-off events. [2023-01-27 21:17:48,525 INFO L131 PetriNetUnfolder]: For 251151/251151 co-relation queries the response was YES. [2023-01-27 21:17:48,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64250 conditions, 5857 events. 3219/5857 cut-off events. For 251151/251151 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41789 event pairs, 20 based on Foata normal form. 6/5863 useless extension candidates. Maximal degree in co-relation 64091. Up to 1805 conditions per place. [2023-01-27 21:17:48,589 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 597 selfloop transitions, 666 changer transitions 19/1282 dead transitions. [2023-01-27 21:17:48,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1282 transitions, 32630 flow [2023-01-27 21:17:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-27 21:17:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-27 21:17:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3467 transitions. [2023-01-27 21:17:48,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28050161812297736 [2023-01-27 21:17:48,593 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3467 transitions. [2023-01-27 21:17:48,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3467 transitions. [2023-01-27 21:17:48,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:17:48,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3467 transitions. [2023-01-27 21:17:48,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.78333333333333) internal successors, (3467), 60 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:48,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:48,603 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:48,603 INFO L175 Difference]: Start difference. First operand has 427 places, 817 transitions, 16330 flow. Second operand 60 states and 3467 transitions. [2023-01-27 21:17:48,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1282 transitions, 32630 flow [2023-01-27 21:17:49,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1282 transitions, 28404 flow, removed 2055 selfloop flow, removed 19 redundant places. [2023-01-27 21:17:49,349 INFO L231 Difference]: Finished difference. Result has 487 places, 1147 transitions, 27152 flow [2023-01-27 21:17:49,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=14088, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=27152, PETRI_PLACES=487, PETRI_TRANSITIONS=1147} [2023-01-27 21:17:49,350 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 466 predicate places. [2023-01-27 21:17:49,350 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1147 transitions, 27152 flow [2023-01-27 21:17:49,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 54.41463414634146) internal successors, (2231), 41 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:49,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:17:49,350 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:17:49,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-27 21:17:49,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:49,556 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:17:49,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:17:49,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1007294427, now seen corresponding path program 45 times [2023-01-27 21:17:49,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:17:49,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899555104] [2023-01-27 21:17:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:17:49,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:17:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:17:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:50,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:17:50,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899555104] [2023-01-27 21:17:50,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899555104] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:17:50,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867114130] [2023-01-27 21:17:50,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:17:50,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:17:50,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:17:50,404 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:17:50,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-27 21:17:50,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:17:50,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:17:50,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 112 conjunts are in the unsatisfiable core [2023-01-27 21:17:50,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:17:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:17:51,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:17:51,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:17:51,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 33 [2023-01-27 21:17:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:51,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:17:51,760 INFO L321 Elim1Store]: treesize reduction 42, result has 64.1 percent of original size [2023-01-27 21:17:51,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 86 [2023-01-27 21:17:51,887 INFO L321 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2023-01-27 21:17:51,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 59 [2023-01-27 21:17:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:17:52,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867114130] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:17:52,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:17:52,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-27 21:17:52,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637227805] [2023-01-27 21:17:52,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:17:52,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-27 21:17:52,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:17:52,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-27 21:17:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1741, Unknown=0, NotChecked=0, Total=1980 [2023-01-27 21:17:52,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:17:52,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1147 transitions, 27152 flow. Second operand has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:17:52,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:17:52,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:17:52,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:00,315 INFO L130 PetriNetUnfolder]: 3338/6153 cut-off events. [2023-01-27 21:18:00,315 INFO L131 PetriNetUnfolder]: For 246599/246599 co-relation queries the response was YES. [2023-01-27 21:18:00,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67061 conditions, 6153 events. 3338/6153 cut-off events. For 246599/246599 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 45167 event pairs, 154 based on Foata normal form. 3/6156 useless extension candidates. Maximal degree in co-relation 66881. Up to 3429 conditions per place. [2023-01-27 21:18:00,390 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 850 selfloop transitions, 532 changer transitions 42/1424 dead transitions. [2023-01-27 21:18:00,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1424 transitions, 36072 flow [2023-01-27 21:18:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-01-27 21:18:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-01-27 21:18:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3808 transitions. [2023-01-27 21:18:00,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2759020431821475 [2023-01-27 21:18:00,394 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3808 transitions. [2023-01-27 21:18:00,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3808 transitions. [2023-01-27 21:18:00,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:00,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3808 transitions. [2023-01-27 21:18:00,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 56.83582089552239) internal successors, (3808), 67 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:00,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 206.0) internal successors, (14008), 68 states have internal predecessors, (14008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:00,403 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 206.0) internal successors, (14008), 68 states have internal predecessors, (14008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:00,403 INFO L175 Difference]: Start difference. First operand has 487 places, 1147 transitions, 27152 flow. Second operand 67 states and 3808 transitions. [2023-01-27 21:18:00,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1424 transitions, 36072 flow [2023-01-27 21:18:02,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1424 transitions, 28740 flow, removed 3601 selfloop flow, removed 18 redundant places. [2023-01-27 21:18:02,089 INFO L231 Difference]: Finished difference. Result has 547 places, 1269 transitions, 26162 flow [2023-01-27 21:18:02,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=21300, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=26162, PETRI_PLACES=547, PETRI_TRANSITIONS=1269} [2023-01-27 21:18:02,090 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 526 predicate places. [2023-01-27 21:18:02,090 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1269 transitions, 26162 flow [2023-01-27 21:18:02,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:02,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:02,091 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:02,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-27 21:18:02,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-27 21:18:02,292 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:18:02,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash -186725331, now seen corresponding path program 46 times [2023-01-27 21:18:02,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:02,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228052360] [2023-01-27 21:18:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:02,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:03,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:03,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228052360] [2023-01-27 21:18:03,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228052360] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:03,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67131750] [2023-01-27 21:18:03,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:18:03,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:03,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:03,042 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:18:03,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-27 21:18:03,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:18:03,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-27 21:18:03,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:03,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:03,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-27 21:18:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:03,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:03,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:03,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-01-27 21:18:04,411 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-27 21:18:04,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-01-27 21:18:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:04,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67131750] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:04,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:04,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-01-27 21:18:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594956319] [2023-01-27 21:18:04,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:04,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-27 21:18:04,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:04,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-27 21:18:04,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1570, Unknown=0, NotChecked=0, Total=1806 [2023-01-27 21:18:04,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:18:04,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1269 transitions, 26162 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:04,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:04,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:18:04,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:08,717 INFO L130 PetriNetUnfolder]: 3339/6135 cut-off events. [2023-01-27 21:18:08,718 INFO L131 PetriNetUnfolder]: For 179133/179133 co-relation queries the response was YES. [2023-01-27 21:18:08,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59792 conditions, 6135 events. 3339/6135 cut-off events. For 179133/179133 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 44792 event pairs, 449 based on Foata normal form. 2/6137 useless extension candidates. Maximal degree in co-relation 59602. Up to 5541 conditions per place. [2023-01-27 21:18:08,791 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 1060 selfloop transitions, 274 changer transitions 6/1340 dead transitions. [2023-01-27 21:18:08,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1340 transitions, 29792 flow [2023-01-27 21:18:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 21:18:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 21:18:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1950 transitions. [2023-01-27 21:18:08,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27841233580810965 [2023-01-27 21:18:08,794 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1950 transitions. [2023-01-27 21:18:08,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1950 transitions. [2023-01-27 21:18:08,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:08,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1950 transitions. [2023-01-27 21:18:08,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.35294117647059) internal successors, (1950), 34 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:08,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:08,799 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:08,799 INFO L175 Difference]: Start difference. First operand has 547 places, 1269 transitions, 26162 flow. Second operand 34 states and 1950 transitions. [2023-01-27 21:18:08,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1340 transitions, 29792 flow [2023-01-27 21:18:10,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1340 transitions, 28029 flow, removed 727 selfloop flow, removed 45 redundant places. [2023-01-27 21:18:10,309 INFO L231 Difference]: Finished difference. Result has 538 places, 1285 transitions, 25673 flow [2023-01-27 21:18:10,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=24465, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=25673, PETRI_PLACES=538, PETRI_TRANSITIONS=1285} [2023-01-27 21:18:10,310 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 517 predicate places. [2023-01-27 21:18:10,310 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 1285 transitions, 25673 flow [2023-01-27 21:18:10,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:10,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:10,310 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:10,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-27 21:18:10,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:10,515 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:18:10,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:10,516 INFO L85 PathProgramCache]: Analyzing trace with hash -399050777, now seen corresponding path program 47 times [2023-01-27 21:18:10,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:10,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157292241] [2023-01-27 21:18:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:10,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:11,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:11,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157292241] [2023-01-27 21:18:11,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157292241] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:11,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669318560] [2023-01-27 21:18:11,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:18:11,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:11,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:11,178 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:18:11,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-27 21:18:11,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 21:18:11,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-27 21:18:11,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:18:11,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:11,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:11,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-27 21:18:11,935 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-27 21:18:11,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-27 21:18:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:18:12,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669318560] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:12,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:12,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-01-27 21:18:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216138172] [2023-01-27 21:18:12,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:12,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-27 21:18:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:12,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-27 21:18:12,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2023-01-27 21:18:12,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:18:12,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1285 transitions, 25673 flow. Second operand has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:12,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:12,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:18:12,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:15,837 INFO L130 PetriNetUnfolder]: 3478/6414 cut-off events. [2023-01-27 21:18:15,837 INFO L131 PetriNetUnfolder]: For 207016/207016 co-relation queries the response was YES. [2023-01-27 21:18:15,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63777 conditions, 6414 events. 3478/6414 cut-off events. For 207016/207016 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 47246 event pairs, 492 based on Foata normal form. 6/6420 useless extension candidates. Maximal degree in co-relation 63586. Up to 5814 conditions per place. [2023-01-27 21:18:15,906 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1209 selfloop transitions, 190 changer transitions 3/1402 dead transitions. [2023-01-27 21:18:15,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1402 transitions, 31904 flow [2023-01-27 21:18:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 21:18:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 21:18:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1561 transitions. [2023-01-27 21:18:15,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3157362459546926 [2023-01-27 21:18:15,908 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1561 transitions. [2023-01-27 21:18:15,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1561 transitions. [2023-01-27 21:18:15,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:15,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1561 transitions. [2023-01-27 21:18:15,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.04166666666667) internal successors, (1561), 24 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:15,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 206.0) internal successors, (5150), 25 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:15,912 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 206.0) internal successors, (5150), 25 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:15,912 INFO L175 Difference]: Start difference. First operand has 538 places, 1285 transitions, 25673 flow. Second operand 24 states and 1561 transitions. [2023-01-27 21:18:15,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1402 transitions, 31904 flow [2023-01-27 21:18:17,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1402 transitions, 31461 flow, removed 71 selfloop flow, removed 26 redundant places. [2023-01-27 21:18:17,597 INFO L231 Difference]: Finished difference. Result has 542 places, 1327 transitions, 28186 flow [2023-01-27 21:18:17,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=25230, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=28186, PETRI_PLACES=542, PETRI_TRANSITIONS=1327} [2023-01-27 21:18:17,601 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 521 predicate places. [2023-01-27 21:18:17,601 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 1327 transitions, 28186 flow [2023-01-27 21:18:17,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:17,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:17,601 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:17,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-27 21:18:17,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-01-27 21:18:17,802 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:18:17,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:17,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1441966515, now seen corresponding path program 48 times [2023-01-27 21:18:17,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:17,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558131868] [2023-01-27 21:18:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:17,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:18,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:18,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558131868] [2023-01-27 21:18:18,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558131868] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:18,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673892797] [2023-01-27 21:18:18,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:18:18,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:18,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:18,722 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:18:18,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-27 21:18:18,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:18:18,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:18,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-01-27 21:18:18,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:19,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:18:19,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:18:19,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:18:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:18:19,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:19,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-27 21:18:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:19,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:20,412 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse3 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_1782 (Array Int Int)) (v_subst_20 Int)) (or (< (+ 2 v_subst_20) c_~N~0) (<= c_~N~0 (+ v_subst_20 1)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1782) c_~A~0.base))) (< (let ((.cse1 (* v_subst_20 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 4)) (select .cse0 (+ c_~A~0.offset .cse1)))) (+ c_~counter~0 (select .cse0 .cse2) (select .cse0 .cse3) 1))))) (forall ((v_subst_19 Int) (v_ArrVal_1782 (Array Int Int))) (or (< (+ 2 v_subst_19) c_~N~0) (<= c_~N~0 (+ v_subst_19 1)) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1782) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse4 .cse2) (select .cse4 .cse3)) (let ((.cse5 (* v_subst_19 4))) (+ (select .cse4 (+ c_~A~0.offset 4 .cse5)) (select .cse4 (+ c_~A~0.offset .cse5)))))))))) is different from false [2023-01-27 21:18:20,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:20,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 74 [2023-01-27 21:18:20,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:20,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 318 treesize of output 292 [2023-01-27 21:18:20,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:20,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 64 [2023-01-27 21:18:20,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:20,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 63 [2023-01-27 21:18:20,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:20,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 75 [2023-01-27 21:18:20,926 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-27 21:18:20,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 137 [2023-01-27 21:18:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:18:20,933 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:18:20,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:18:20,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 49 [2023-01-27 21:18:20,948 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-27 21:18:20,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 66 [2023-01-27 21:18:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:21,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673892797] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:21,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:21,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2023-01-27 21:18:21,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493163260] [2023-01-27 21:18:21,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:21,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-27 21:18:21,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:21,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-27 21:18:21,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1603, Unknown=1, NotChecked=82, Total=1892 [2023-01-27 21:18:21,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:18:21,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 1327 transitions, 28186 flow. Second operand has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:21,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:21,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:18:21,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:27,560 INFO L130 PetriNetUnfolder]: 3741/6911 cut-off events. [2023-01-27 21:18:27,561 INFO L131 PetriNetUnfolder]: For 232221/232221 co-relation queries the response was YES. [2023-01-27 21:18:27,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70475 conditions, 6911 events. 3741/6911 cut-off events. For 232221/232221 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 52069 event pairs, 191 based on Foata normal form. 6/6917 useless extension candidates. Maximal degree in co-relation 70203. Up to 4844 conditions per place. [2023-01-27 21:18:27,639 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1150 selfloop transitions, 393 changer transitions 21/1564 dead transitions. [2023-01-27 21:18:27,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1564 transitions, 35990 flow [2023-01-27 21:18:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-27 21:18:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-27 21:18:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2805 transitions. [2023-01-27 21:18:27,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27788785417079453 [2023-01-27 21:18:27,642 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2805 transitions. [2023-01-27 21:18:27,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2805 transitions. [2023-01-27 21:18:27,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:27,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2805 transitions. [2023-01-27 21:18:27,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 57.244897959183675) internal successors, (2805), 49 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:27,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:27,649 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:27,649 INFO L175 Difference]: Start difference. First operand has 542 places, 1327 transitions, 28186 flow. Second operand 49 states and 2805 transitions. [2023-01-27 21:18:27,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1564 transitions, 35990 flow [2023-01-27 21:18:29,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 1564 transitions, 34590 flow, removed 651 selfloop flow, removed 13 redundant places. [2023-01-27 21:18:29,295 INFO L231 Difference]: Finished difference. Result has 585 places, 1431 transitions, 31139 flow [2023-01-27 21:18:29,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=26811, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1001, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=31139, PETRI_PLACES=585, PETRI_TRANSITIONS=1431} [2023-01-27 21:18:29,296 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 564 predicate places. [2023-01-27 21:18:29,296 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 1431 transitions, 31139 flow [2023-01-27 21:18:29,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:29,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:29,296 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:29,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-27 21:18:29,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-01-27 21:18:29,502 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:18:29,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:29,502 INFO L85 PathProgramCache]: Analyzing trace with hash -970493305, now seen corresponding path program 49 times [2023-01-27 21:18:29,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:29,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400504082] [2023-01-27 21:18:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:29,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:30,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:30,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400504082] [2023-01-27 21:18:30,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400504082] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:30,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448113333] [2023-01-27 21:18:30,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:18:30,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:30,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:30,279 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:18:30,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-27 21:18:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:30,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-27 21:18:30,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:18:30,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:30,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:30,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-27 21:18:31,025 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-27 21:18:31,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-27 21:18:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:18:31,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448113333] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:31,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:31,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-27 21:18:31,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096411504] [2023-01-27 21:18:31,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:31,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 21:18:31,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:31,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 21:18:31,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 21:18:31,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:18:31,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 1431 transitions, 31139 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:31,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:31,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:18:31,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:35,767 INFO L130 PetriNetUnfolder]: 3917/7265 cut-off events. [2023-01-27 21:18:35,767 INFO L131 PetriNetUnfolder]: For 268519/268519 co-relation queries the response was YES. [2023-01-27 21:18:35,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76501 conditions, 7265 events. 3917/7265 cut-off events. For 268519/268519 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 54792 event pairs, 570 based on Foata normal form. 4/7269 useless extension candidates. Maximal degree in co-relation 75946. Up to 6433 conditions per place. [2023-01-27 21:18:35,847 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1252 selfloop transitions, 312 changer transitions 2/1566 dead transitions. [2023-01-27 21:18:35,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1566 transitions, 38372 flow [2023-01-27 21:18:35,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 21:18:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 21:18:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1844 transitions. [2023-01-27 21:18:35,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2797330097087379 [2023-01-27 21:18:35,849 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1844 transitions. [2023-01-27 21:18:35,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1844 transitions. [2023-01-27 21:18:35,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:35,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1844 transitions. [2023-01-27 21:18:35,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.625) internal successors, (1844), 32 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:35,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:35,854 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:35,854 INFO L175 Difference]: Start difference. First operand has 585 places, 1431 transitions, 31139 flow. Second operand 32 states and 1844 transitions. [2023-01-27 21:18:35,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1566 transitions, 38372 flow [2023-01-27 21:18:37,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 1566 transitions, 37711 flow, removed 277 selfloop flow, removed 23 redundant places. [2023-01-27 21:18:37,828 INFO L231 Difference]: Finished difference. Result has 601 places, 1493 transitions, 34392 flow [2023-01-27 21:18:37,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=30478, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=34392, PETRI_PLACES=601, PETRI_TRANSITIONS=1493} [2023-01-27 21:18:37,829 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 580 predicate places. [2023-01-27 21:18:37,829 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 1493 transitions, 34392 flow [2023-01-27 21:18:37,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:37,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:37,830 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:37,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-27 21:18:38,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:38,035 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:18:38,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1952573787, now seen corresponding path program 50 times [2023-01-27 21:18:38,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:38,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791320783] [2023-01-27 21:18:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:38,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:38,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:38,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791320783] [2023-01-27 21:18:38,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791320783] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:38,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138806207] [2023-01-27 21:18:38,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:18:38,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:38,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:38,719 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:18:38,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-27 21:18:38,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:18:38,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:38,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-27 21:18:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:39,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:39,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-27 21:18:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:39,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:39,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:39,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 114 [2023-01-27 21:18:40,142 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-27 21:18:40,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 65 [2023-01-27 21:18:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:40,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138806207] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:40,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:40,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-01-27 21:18:40,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299273048] [2023-01-27 21:18:40,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:40,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-27 21:18:40,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:40,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-27 21:18:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1586, Unknown=0, NotChecked=0, Total=1806 [2023-01-27 21:18:40,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:18:40,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 1493 transitions, 34392 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:40,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:40,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:18:40,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:45,285 INFO L130 PetriNetUnfolder]: 3959/7348 cut-off events. [2023-01-27 21:18:45,285 INFO L131 PetriNetUnfolder]: For 276502/276502 co-relation queries the response was YES. [2023-01-27 21:18:45,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78197 conditions, 7348 events. 3959/7348 cut-off events. For 276502/276502 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 55516 event pairs, 620 based on Foata normal form. 3/7351 useless extension candidates. Maximal degree in co-relation 77980. Up to 7025 conditions per place. [2023-01-27 21:18:45,373 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 1402 selfloop transitions, 154 changer transitions 3/1559 dead transitions. [2023-01-27 21:18:45,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 1559 transitions, 38657 flow [2023-01-27 21:18:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 21:18:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 21:18:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1942 transitions. [2023-01-27 21:18:45,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2772701313535123 [2023-01-27 21:18:45,375 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1942 transitions. [2023-01-27 21:18:45,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1942 transitions. [2023-01-27 21:18:45,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:45,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1942 transitions. [2023-01-27 21:18:45,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.11764705882353) internal successors, (1942), 34 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:45,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:45,380 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:45,380 INFO L175 Difference]: Start difference. First operand has 601 places, 1493 transitions, 34392 flow. Second operand 34 states and 1942 transitions. [2023-01-27 21:18:45,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 1559 transitions, 38657 flow [2023-01-27 21:18:47,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 1559 transitions, 36409 flow, removed 1048 selfloop flow, removed 18 redundant places. [2023-01-27 21:18:47,521 INFO L231 Difference]: Finished difference. Result has 619 places, 1506 transitions, 33323 flow [2023-01-27 21:18:47,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=32626, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=33323, PETRI_PLACES=619, PETRI_TRANSITIONS=1506} [2023-01-27 21:18:47,522 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 598 predicate places. [2023-01-27 21:18:47,522 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 1506 transitions, 33323 flow [2023-01-27 21:18:47,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:47,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:47,522 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:47,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-01-27 21:18:47,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-01-27 21:18:47,725 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:18:47,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:47,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1356416081, now seen corresponding path program 51 times [2023-01-27 21:18:47,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:47,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363893883] [2023-01-27 21:18:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:47,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:18:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:18:48,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:18:48,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363893883] [2023-01-27 21:18:48,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363893883] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:18:48,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668911716] [2023-01-27 21:18:48,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:18:48,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:18:48,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:18:48,362 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:18:48,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-27 21:18:48,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:18:48,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:18:48,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-01-27 21:18:48,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:18:48,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-01-27 21:18:48,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:18:48,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:18:48,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:18:48,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-27 21:18:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:18:48,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:18:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:18:49,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668911716] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:18:49,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:18:49,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 39 [2023-01-27 21:18:49,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326818302] [2023-01-27 21:18:49,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:18:49,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-27 21:18:49,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:18:49,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-27 21:18:49,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2023-01-27 21:18:49,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:18:49,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 1506 transitions, 33323 flow. Second operand has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:49,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:18:49,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:18:49,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:18:56,900 INFO L130 PetriNetUnfolder]: 4110/7661 cut-off events. [2023-01-27 21:18:56,900 INFO L131 PetriNetUnfolder]: For 290183/290183 co-relation queries the response was YES. [2023-01-27 21:18:56,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81401 conditions, 7661 events. 4110/7661 cut-off events. For 290183/290183 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 58709 event pairs, 588 based on Foata normal form. 4/7665 useless extension candidates. Maximal degree in co-relation 81180. Up to 6861 conditions per place. [2023-01-27 21:18:56,993 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1331 selfloop transitions, 314 changer transitions 8/1653 dead transitions. [2023-01-27 21:18:56,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 1653 transitions, 40722 flow [2023-01-27 21:18:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 21:18:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 21:18:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2290 transitions. [2023-01-27 21:18:56,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2779126213592233 [2023-01-27 21:18:56,995 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2290 transitions. [2023-01-27 21:18:56,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2290 transitions. [2023-01-27 21:18:56,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:18:56,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2290 transitions. [2023-01-27 21:18:56,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.25) internal successors, (2290), 40 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:57,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:57,000 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:57,000 INFO L175 Difference]: Start difference. First operand has 619 places, 1506 transitions, 33323 flow. Second operand 40 states and 2290 transitions. [2023-01-27 21:18:57,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 1653 transitions, 40722 flow [2023-01-27 21:18:59,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 1653 transitions, 40533 flow, removed 21 selfloop flow, removed 24 redundant places. [2023-01-27 21:18:59,466 INFO L231 Difference]: Finished difference. Result has 646 places, 1574 transitions, 37265 flow [2023-01-27 21:18:59,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=33134, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=37265, PETRI_PLACES=646, PETRI_TRANSITIONS=1574} [2023-01-27 21:18:59,467 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 625 predicate places. [2023-01-27 21:18:59,467 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 1574 transitions, 37265 flow [2023-01-27 21:18:59,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:18:59,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:18:59,467 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:18:59,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-01-27 21:18:59,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-27 21:18:59,669 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:18:59,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:18:59,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1894271659, now seen corresponding path program 52 times [2023-01-27 21:18:59,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:18:59,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900964933] [2023-01-27 21:18:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:18:59,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:18:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:19:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:19:00,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:19:00,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900964933] [2023-01-27 21:19:00,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900964933] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:19:00,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854692476] [2023-01-27 21:19:00,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:19:00,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:19:00,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:19:00,622 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:19:00,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-27 21:19:00,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:19:00,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:19:00,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-27 21:19:00,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:19:01,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:19:01,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-27 21:19:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:19:01,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:19:01,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:19:01,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-01-27 21:19:02,033 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-27 21:19:02,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-01-27 21:19:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:19:02,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854692476] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:19:02,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:19:02,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-01-27 21:19:02,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135325148] [2023-01-27 21:19:02,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:19:02,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-27 21:19:02,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:19:02,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-27 21:19:02,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2023-01-27 21:19:02,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:19:02,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 1574 transitions, 37265 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:02,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:19:02,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:19:02,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:19:07,688 INFO L130 PetriNetUnfolder]: 4212/7877 cut-off events. [2023-01-27 21:19:07,689 INFO L131 PetriNetUnfolder]: For 385078/385078 co-relation queries the response was YES. [2023-01-27 21:19:07,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90144 conditions, 7877 events. 4212/7877 cut-off events. For 385078/385078 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 61321 event pairs, 587 based on Foata normal form. 8/7885 useless extension candidates. Maximal degree in co-relation 89910. Up to 7280 conditions per place. [2023-01-27 21:19:07,791 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1432 selfloop transitions, 246 changer transitions 6/1684 dead transitions. [2023-01-27 21:19:07,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 1684 transitions, 43221 flow [2023-01-27 21:19:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 21:19:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 21:19:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1726 transitions. [2023-01-27 21:19:07,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27928802588996765 [2023-01-27 21:19:07,793 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1726 transitions. [2023-01-27 21:19:07,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1726 transitions. [2023-01-27 21:19:07,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:19:07,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1726 transitions. [2023-01-27 21:19:07,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.53333333333333) internal successors, (1726), 30 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:07,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:07,797 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:07,797 INFO L175 Difference]: Start difference. First operand has 646 places, 1574 transitions, 37265 flow. Second operand 30 states and 1726 transitions. [2023-01-27 21:19:07,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 1684 transitions, 43221 flow [2023-01-27 21:19:10,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 1684 transitions, 41064 flow, removed 958 selfloop flow, removed 25 redundant places. [2023-01-27 21:19:10,772 INFO L231 Difference]: Finished difference. Result has 654 places, 1622 transitions, 37692 flow [2023-01-27 21:19:10,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=35152, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=37692, PETRI_PLACES=654, PETRI_TRANSITIONS=1622} [2023-01-27 21:19:10,773 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 633 predicate places. [2023-01-27 21:19:10,774 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 1622 transitions, 37692 flow [2023-01-27 21:19:10,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:10,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:19:10,774 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:19:10,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-01-27 21:19:10,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:19:10,979 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:19:10,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:19:10,979 INFO L85 PathProgramCache]: Analyzing trace with hash 823650291, now seen corresponding path program 53 times [2023-01-27 21:19:10,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:19:10,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248298543] [2023-01-27 21:19:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:19:10,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:19:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:19:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:19:11,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:19:11,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248298543] [2023-01-27 21:19:11,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248298543] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:19:11,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131137952] [2023-01-27 21:19:11,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:19:11,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:19:11,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:19:11,655 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:19:11,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-27 21:19:11,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 21:19:11,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:19:11,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-27 21:19:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:19:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:19:12,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:19:12,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:19:12,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-27 21:19:12,326 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-27 21:19:12,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-27 21:19:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:19:12,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131137952] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:19:12,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:19:12,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-01-27 21:19:12,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305810570] [2023-01-27 21:19:12,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:19:12,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 21:19:12,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:19:12,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 21:19:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 21:19:12,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:19:12,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 1622 transitions, 37692 flow. Second operand has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:12,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:19:12,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:19:12,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:19:18,094 INFO L130 PetriNetUnfolder]: 4364/8216 cut-off events. [2023-01-27 21:19:18,095 INFO L131 PetriNetUnfolder]: For 425820/425820 co-relation queries the response was YES. [2023-01-27 21:19:18,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95495 conditions, 8216 events. 4364/8216 cut-off events. For 425820/425820 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 64669 event pairs, 625 based on Foata normal form. 6/8222 useless extension candidates. Maximal degree in co-relation 95259. Up to 7429 conditions per place. [2023-01-27 21:19:18,202 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 1522 selfloop transitions, 231 changer transitions 4/1757 dead transitions. [2023-01-27 21:19:18,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 1757 transitions, 45808 flow [2023-01-27 21:19:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-27 21:19:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-27 21:19:18,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1914 transitions. [2023-01-27 21:19:18,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2815533980582524 [2023-01-27 21:19:18,204 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1914 transitions. [2023-01-27 21:19:18,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1914 transitions. [2023-01-27 21:19:18,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:19:18,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1914 transitions. [2023-01-27 21:19:18,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.0) internal successors, (1914), 33 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:18,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:18,208 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:18,208 INFO L175 Difference]: Start difference. First operand has 654 places, 1622 transitions, 37692 flow. Second operand 33 states and 1914 transitions. [2023-01-27 21:19:18,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 1757 transitions, 45808 flow [2023-01-27 21:19:21,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 1757 transitions, 45274 flow, removed 222 selfloop flow, removed 17 redundant places. [2023-01-27 21:19:21,453 INFO L231 Difference]: Finished difference. Result has 673 places, 1665 transitions, 40638 flow [2023-01-27 21:19:21,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=37158, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=40638, PETRI_PLACES=673, PETRI_TRANSITIONS=1665} [2023-01-27 21:19:21,454 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 652 predicate places. [2023-01-27 21:19:21,454 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 1665 transitions, 40638 flow [2023-01-27 21:19:21,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:21,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:19:21,455 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:19:21,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-01-27 21:19:21,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:19:21,660 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:19:21,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:19:21,660 INFO L85 PathProgramCache]: Analyzing trace with hash -45333221, now seen corresponding path program 54 times [2023-01-27 21:19:21,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:19:21,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111138781] [2023-01-27 21:19:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:19:21,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:19:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:19:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:19:22,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:19:22,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111138781] [2023-01-27 21:19:22,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111138781] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:19:22,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530693009] [2023-01-27 21:19:22,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:19:22,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:19:22,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:19:22,235 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:19:22,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-27 21:19:22,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 21:19:22,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:19:22,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 110 conjunts are in the unsatisfiable core [2023-01-27 21:19:22,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:19:22,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:19:22,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-27 21:19:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:19:22,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:19:23,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:19:23,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-27 21:19:23,042 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-27 21:19:23,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-27 21:19:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:19:23,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530693009] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:19:23,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:19:23,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 35 [2023-01-27 21:19:23,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690861406] [2023-01-27 21:19:23,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:19:23,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-27 21:19:23,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:19:23,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-27 21:19:23,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2023-01-27 21:19:23,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:19:23,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 1665 transitions, 40638 flow. Second operand has 37 states, 37 states have (on average 61.62162162162162) internal successors, (2280), 37 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:23,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:19:23,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:19:23,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:19:29,476 INFO L130 PetriNetUnfolder]: 4388/8270 cut-off events. [2023-01-27 21:19:29,476 INFO L131 PetriNetUnfolder]: For 420261/420261 co-relation queries the response was YES. [2023-01-27 21:19:29,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96160 conditions, 8270 events. 4388/8270 cut-off events. For 420261/420261 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 65528 event pairs, 622 based on Foata normal form. 2/8272 useless extension candidates. Maximal degree in co-relation 95919. Up to 7513 conditions per place. [2023-01-27 21:19:29,582 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1473 selfloop transitions, 261 changer transitions 8/1742 dead transitions. [2023-01-27 21:19:29,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 1742 transitions, 45346 flow [2023-01-27 21:19:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-27 21:19:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-27 21:19:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2117 transitions. [2023-01-27 21:19:29,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31141512209473377 [2023-01-27 21:19:29,584 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2117 transitions. [2023-01-27 21:19:29,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2117 transitions. [2023-01-27 21:19:29,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:19:29,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2117 transitions. [2023-01-27 21:19:29,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 64.15151515151516) internal successors, (2117), 33 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:29,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:29,589 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:29,589 INFO L175 Difference]: Start difference. First operand has 673 places, 1665 transitions, 40638 flow. Second operand 33 states and 2117 transitions. [2023-01-27 21:19:29,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 1742 transitions, 45346 flow [2023-01-27 21:19:32,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1742 transitions, 43259 flow, removed 962 selfloop flow, removed 20 redundant places. [2023-01-27 21:19:32,944 INFO L231 Difference]: Finished difference. Result has 689 places, 1672 transitions, 39323 flow [2023-01-27 21:19:32,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38542, PETRI_DIFFERENCE_MINUEND_PLACES=652, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=39323, PETRI_PLACES=689, PETRI_TRANSITIONS=1672} [2023-01-27 21:19:32,945 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 668 predicate places. [2023-01-27 21:19:32,945 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 1672 transitions, 39323 flow [2023-01-27 21:19:32,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 61.62162162162162) internal successors, (2280), 37 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:32,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:19:32,946 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:19:32,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-27 21:19:33,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:19:33,150 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:19:33,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:19:33,151 INFO L85 PathProgramCache]: Analyzing trace with hash -934274975, now seen corresponding path program 55 times [2023-01-27 21:19:33,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:19:33,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587834236] [2023-01-27 21:19:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:19:33,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:19:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:19:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:19:33,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:19:33,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587834236] [2023-01-27 21:19:33,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587834236] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:19:33,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122440720] [2023-01-27 21:19:33,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:19:33,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:19:33,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:19:33,858 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:19:33,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-27 21:19:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:19:34,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-01-27 21:19:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:19:34,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:19:34,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2023-01-27 21:19:34,433 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:19:34,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:19:34,434 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:19:34,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:19:34,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2023-01-27 21:19:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:19:34,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:19:34,631 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse3 (+ c_~A~0.offset 8)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_2053 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053) c_~A~0.base))) (+ (select .cse1 c_~A~0.offset) (select .cse1 .cse2) (select .cse1 .cse3))))) (forall ((v_ArrVal_2053 (Array Int Int))) (< (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053) c_~A~0.base))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse2) (select .cse4 .cse3))) (+ .cse0 c_~counter~0 1))))) is different from false [2023-01-27 21:19:34,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:19:34,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 118 [2023-01-27 21:19:34,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:19:34,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 14 [2023-01-27 21:19:34,864 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:19:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-01-27 21:19:34,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122440720] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:19:34,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:19:34,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 35 [2023-01-27 21:19:34,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560098315] [2023-01-27 21:19:34,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:19:34,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-27 21:19:34,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:19:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-27 21:19:34,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1121, Unknown=17, NotChecked=68, Total=1332 [2023-01-27 21:19:34,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:19:34,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 1672 transitions, 39323 flow. Second operand has 37 states, 37 states have (on average 54.567567567567565) internal successors, (2019), 37 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:34,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:19:34,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:19:34,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:19:40,849 INFO L130 PetriNetUnfolder]: 4533/8543 cut-off events. [2023-01-27 21:19:40,850 INFO L131 PetriNetUnfolder]: For 439591/439591 co-relation queries the response was YES. [2023-01-27 21:19:40,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99420 conditions, 8543 events. 4533/8543 cut-off events. For 439591/439591 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 68156 event pairs, 571 based on Foata normal form. 5/8548 useless extension candidates. Maximal degree in co-relation 99173. Up to 7219 conditions per place. [2023-01-27 21:19:40,970 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1365 selfloop transitions, 408 changer transitions 1/1774 dead transitions. [2023-01-27 21:19:40,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 1774 transitions, 45010 flow [2023-01-27 21:19:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 21:19:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 21:19:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1270 transitions. [2023-01-27 21:19:40,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2802294792586055 [2023-01-27 21:19:40,972 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1270 transitions. [2023-01-27 21:19:40,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1270 transitions. [2023-01-27 21:19:40,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:19:40,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1270 transitions. [2023-01-27 21:19:40,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 57.72727272727273) internal successors, (1270), 22 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:40,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:40,975 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:40,975 INFO L175 Difference]: Start difference. First operand has 689 places, 1672 transitions, 39323 flow. Second operand 22 states and 1270 transitions. [2023-01-27 21:19:40,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 1774 transitions, 45010 flow [2023-01-27 21:19:44,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1774 transitions, 44415 flow, removed 97 selfloop flow, removed 26 redundant places. [2023-01-27 21:19:44,740 INFO L231 Difference]: Finished difference. Result has 689 places, 1716 transitions, 41348 flow [2023-01-27 21:19:44,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38728, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=41348, PETRI_PLACES=689, PETRI_TRANSITIONS=1716} [2023-01-27 21:19:44,741 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 668 predicate places. [2023-01-27 21:19:44,741 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 1716 transitions, 41348 flow [2023-01-27 21:19:44,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.567567567567565) internal successors, (2019), 37 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:44,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:19:44,741 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:19:44,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-27 21:19:44,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-01-27 21:19:44,946 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:19:44,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:19:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1135077057, now seen corresponding path program 56 times [2023-01-27 21:19:44,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:19:44,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803926565] [2023-01-27 21:19:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:19:44,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:19:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:19:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:19:45,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:19:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803926565] [2023-01-27 21:19:45,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803926565] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:19:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149933005] [2023-01-27 21:19:45,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:19:45,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:19:45,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:19:45,627 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:19:45,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-27 21:19:45,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:19:45,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:19:45,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 102 conjunts are in the unsatisfiable core [2023-01-27 21:19:45,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:19:45,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:19:45,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-27 21:19:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:19:46,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:19:46,184 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (.cse1 (+ c_~A~0.offset 4)) (.cse2 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_2092 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2092) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ c_~counter~0 (select .cse0 .cse3) 1)))) (forall ((v_ArrVal_2092 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2092) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse4 .cse3)) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1) (select .cse4 .cse2))))))) is different from false [2023-01-27 21:19:46,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:19:46,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 125 [2023-01-27 21:19:46,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:19:46,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-01-27 21:19:46,500 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:19:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:19:46,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149933005] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:19:46,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:19:46,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2023-01-27 21:19:46,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671781627] [2023-01-27 21:19:46,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:19:46,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-27 21:19:46,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:19:46,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-27 21:19:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1056, Unknown=12, NotChecked=66, Total=1260 [2023-01-27 21:19:46,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:19:46,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 1716 transitions, 41348 flow. Second operand has 36 states, 36 states have (on average 54.5) internal successors, (1962), 36 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:46,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:19:46,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:19:46,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:19:53,409 INFO L130 PetriNetUnfolder]: 4929/9297 cut-off events. [2023-01-27 21:19:53,409 INFO L131 PetriNetUnfolder]: For 521108/521108 co-relation queries the response was YES. [2023-01-27 21:19:53,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111079 conditions, 9297 events. 4929/9297 cut-off events. For 521108/521108 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 75577 event pairs, 658 based on Foata normal form. 2/9299 useless extension candidates. Maximal degree in co-relation 110828. Up to 7983 conditions per place. [2023-01-27 21:19:53,542 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1487 selfloop transitions, 451 changer transitions 1/1939 dead transitions. [2023-01-27 21:19:53,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 1939 transitions, 51515 flow [2023-01-27 21:19:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 21:19:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 21:19:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2018 transitions. [2023-01-27 21:19:53,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2798890429958391 [2023-01-27 21:19:53,544 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2018 transitions. [2023-01-27 21:19:53,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2018 transitions. [2023-01-27 21:19:53,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:19:53,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2018 transitions. [2023-01-27 21:19:53,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.65714285714286) internal successors, (2018), 35 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:53,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:53,548 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:53,548 INFO L175 Difference]: Start difference. First operand has 689 places, 1716 transitions, 41348 flow. Second operand 35 states and 2018 transitions. [2023-01-27 21:19:53,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 1939 transitions, 51515 flow [2023-01-27 21:19:57,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 707 places, 1939 transitions, 49952 flow, removed 588 selfloop flow, removed 16 redundant places. [2023-01-27 21:19:57,720 INFO L231 Difference]: Finished difference. Result has 718 places, 1846 transitions, 46147 flow [2023-01-27 21:19:57,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=40181, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=46147, PETRI_PLACES=718, PETRI_TRANSITIONS=1846} [2023-01-27 21:19:57,721 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 697 predicate places. [2023-01-27 21:19:57,721 INFO L495 AbstractCegarLoop]: Abstraction has has 718 places, 1846 transitions, 46147 flow [2023-01-27 21:19:57,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 54.5) internal successors, (1962), 36 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:19:57,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:19:57,722 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:19:57,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-01-27 21:19:57,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-01-27 21:19:57,927 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:19:57,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:19:57,927 INFO L85 PathProgramCache]: Analyzing trace with hash 701657255, now seen corresponding path program 57 times [2023-01-27 21:19:57,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:19:57,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011171255] [2023-01-27 21:19:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:19:57,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:19:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:19:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:19:58,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:19:58,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011171255] [2023-01-27 21:19:58,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011171255] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:19:58,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703083826] [2023-01-27 21:19:58,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:19:58,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:19:58,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:19:58,771 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:19:58,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-27 21:19:58,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 21:19:58,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:19:58,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-01-27 21:19:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:19:59,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:19:59,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:19:59,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:19:59,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:19:59,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:19:59,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-27 21:19:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:19:59,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:20:00,176 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_subst_29 Int) (v_ArrVal_2134 (Array Int Int))) (or (<= c_~N~0 (+ v_subst_29 1)) (< (+ 2 v_subst_29) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2134) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 .cse2)) (let ((.cse3 (* v_subst_29 4))) (+ (select .cse0 (+ c_~A~0.offset 4 .cse3)) c_~counter~0 1 (select .cse0 (+ c_~A~0.offset .cse3)))))))) (forall ((v_ArrVal_2134 (Array Int Int)) (v_subst_30 Int)) (or (<= c_~N~0 (+ v_subst_30 1)) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2134) c_~A~0.base))) (<= (let ((.cse5 (* v_subst_30 4))) (+ (select .cse4 (+ c_~A~0.offset .cse5 4)) c_~counter~0 (select .cse4 (+ c_~A~0.offset .cse5)))) (+ (select .cse4 .cse1) (select .cse4 .cse2)))) (< (+ 2 v_subst_30) c_~N~0))))) is different from false [2023-01-27 21:20:00,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:20:00,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 75 [2023-01-27 21:20:00,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:20:00,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 300 [2023-01-27 21:20:00,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:20:00,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 66 [2023-01-27 21:20:00,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:20:00,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 65 [2023-01-27 21:20:00,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:20:00,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 74 [2023-01-27 21:20:00,646 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-27 21:20:00,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 318 treesize of output 268 [2023-01-27 21:20:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:20:00,654 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:20:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:20:00,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 21 [2023-01-27 21:20:00,668 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-27 21:20:00,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 39 [2023-01-27 21:20:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:20:00,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703083826] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:20:00,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:20:00,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-27 21:20:00,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665712210] [2023-01-27 21:20:00,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:20:00,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-27 21:20:00,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:20:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-27 21:20:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1686, Unknown=1, NotChecked=84, Total=1980 [2023-01-27 21:20:00,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:20:00,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 718 places, 1846 transitions, 46147 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:00,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:20:00,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:20:00,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:20:10,521 INFO L130 PetriNetUnfolder]: 5192/9756 cut-off events. [2023-01-27 21:20:10,521 INFO L131 PetriNetUnfolder]: For 580845/580845 co-relation queries the response was YES. [2023-01-27 21:20:10,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119830 conditions, 9756 events. 5192/9756 cut-off events. For 580845/580845 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 79448 event pairs, 89 based on Foata normal form. 4/9760 useless extension candidates. Maximal degree in co-relation 119568. Up to 4843 conditions per place. [2023-01-27 21:20:10,658 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 1327 selfloop transitions, 750 changer transitions 17/2094 dead transitions. [2023-01-27 21:20:10,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 2094 transitions, 57277 flow [2023-01-27 21:20:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-27 21:20:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-27 21:20:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3423 transitions. [2023-01-27 21:20:10,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27694174757281553 [2023-01-27 21:20:10,661 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3423 transitions. [2023-01-27 21:20:10,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3423 transitions. [2023-01-27 21:20:10,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:20:10,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3423 transitions. [2023-01-27 21:20:10,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.05) internal successors, (3423), 60 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:10,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:10,670 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:10,670 INFO L175 Difference]: Start difference. First operand has 718 places, 1846 transitions, 46147 flow. Second operand 60 states and 3423 transitions. [2023-01-27 21:20:10,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 2094 transitions, 57277 flow [2023-01-27 21:20:15,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 2094 transitions, 55142 flow, removed 911 selfloop flow, removed 20 redundant places. [2023-01-27 21:20:15,174 INFO L231 Difference]: Finished difference. Result has 771 places, 1984 transitions, 52001 flow [2023-01-27 21:20:15,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=44058, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=630, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=52001, PETRI_PLACES=771, PETRI_TRANSITIONS=1984} [2023-01-27 21:20:15,175 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 750 predicate places. [2023-01-27 21:20:15,175 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 1984 transitions, 52001 flow [2023-01-27 21:20:15,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:15,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:20:15,177 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:20:15,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-27 21:20:15,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-01-27 21:20:15,382 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:20:15,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:20:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1236504761, now seen corresponding path program 58 times [2023-01-27 21:20:15,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:20:15,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919473028] [2023-01-27 21:20:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:20:15,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:20:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:20:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:20:16,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:20:16,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919473028] [2023-01-27 21:20:16,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919473028] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:20:16,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025949449] [2023-01-27 21:20:16,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:20:16,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:20:16,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:20:16,229 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:20:16,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-27 21:20:16,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:20:16,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:20:16,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-27 21:20:16,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:20:16,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:20:16,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-27 21:20:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:20:16,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:20:17,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:20:17,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 114 [2023-01-27 21:20:17,585 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-27 21:20:17,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 65 [2023-01-27 21:20:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:20:17,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025949449] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:20:17,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:20:17,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-01-27 21:20:17,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133135071] [2023-01-27 21:20:17,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:20:17,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-27 21:20:17,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:20:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-27 21:20:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1580, Unknown=0, NotChecked=0, Total=1806 [2023-01-27 21:20:17,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:20:17,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 1984 transitions, 52001 flow. Second operand has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:17,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:20:17,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:20:17,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:20:27,791 INFO L130 PetriNetUnfolder]: 5328/10011 cut-off events. [2023-01-27 21:20:27,792 INFO L131 PetriNetUnfolder]: For 690025/690025 co-relation queries the response was YES. [2023-01-27 21:20:27,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129714 conditions, 10011 events. 5328/10011 cut-off events. For 690025/690025 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 81965 event pairs, 739 based on Foata normal form. 3/10014 useless extension candidates. Maximal degree in co-relation 129439. Up to 9128 conditions per place. [2023-01-27 21:20:27,939 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1732 selfloop transitions, 376 changer transitions 7/2115 dead transitions. [2023-01-27 21:20:27,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 813 places, 2115 transitions, 60199 flow [2023-01-27 21:20:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-01-27 21:20:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-01-27 21:20:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2455 transitions. [2023-01-27 21:20:27,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.277150598329194 [2023-01-27 21:20:27,941 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2455 transitions. [2023-01-27 21:20:27,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2455 transitions. [2023-01-27 21:20:27,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:20:27,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2455 transitions. [2023-01-27 21:20:27,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 57.093023255813954) internal successors, (2455), 43 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:27,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 206.0) internal successors, (9064), 44 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:27,946 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 206.0) internal successors, (9064), 44 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:27,946 INFO L175 Difference]: Start difference. First operand has 771 places, 1984 transitions, 52001 flow. Second operand 43 states and 2455 transitions. [2023-01-27 21:20:27,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 813 places, 2115 transitions, 60199 flow [2023-01-27 21:20:34,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 792 places, 2115 transitions, 56713 flow, removed 1688 selfloop flow, removed 21 redundant places. [2023-01-27 21:20:34,798 INFO L231 Difference]: Finished difference. Result has 797 places, 2039 transitions, 52622 flow [2023-01-27 21:20:34,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=49011, PETRI_DIFFERENCE_MINUEND_PLACES=750, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=52622, PETRI_PLACES=797, PETRI_TRANSITIONS=2039} [2023-01-27 21:20:34,800 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 776 predicate places. [2023-01-27 21:20:34,800 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 2039 transitions, 52622 flow [2023-01-27 21:20:34,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:34,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:20:34,800 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:20:34,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-01-27 21:20:35,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:20:35,001 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:20:35,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:20:35,001 INFO L85 PathProgramCache]: Analyzing trace with hash -8332551, now seen corresponding path program 59 times [2023-01-27 21:20:35,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:20:35,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321368440] [2023-01-27 21:20:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:20:35,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:20:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:20:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:20:35,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:20:35,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321368440] [2023-01-27 21:20:35,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321368440] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:20:35,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899284126] [2023-01-27 21:20:35,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:20:35,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:20:35,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:20:35,694 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:20:35,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-27 21:20:35,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:20:35,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:20:35,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-27 21:20:35,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:20:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:20:36,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:20:36,347 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:20:36,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-27 21:20:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:20:36,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899284126] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:20:36,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:20:36,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-27 21:20:36,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607978447] [2023-01-27 21:20:36,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:20:36,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 21:20:36,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:20:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 21:20:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 21:20:36,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:20:36,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 2039 transitions, 52622 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:36,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:20:36,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:20:36,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:20:44,759 INFO L130 PetriNetUnfolder]: 5387/10134 cut-off events. [2023-01-27 21:20:44,759 INFO L131 PetriNetUnfolder]: For 703281/703281 co-relation queries the response was YES. [2023-01-27 21:20:44,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130702 conditions, 10134 events. 5387/10134 cut-off events. For 703281/703281 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 82909 event pairs, 851 based on Foata normal form. 4/10138 useless extension candidates. Maximal degree in co-relation 130423. Up to 9576 conditions per place. [2023-01-27 21:20:44,909 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 1856 selfloop transitions, 250 changer transitions 2/2108 dead transitions. [2023-01-27 21:20:44,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 2108 transitions, 58804 flow [2023-01-27 21:20:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 21:20:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 21:20:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1644 transitions. [2023-01-27 21:20:44,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2751925008369602 [2023-01-27 21:20:44,911 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1644 transitions. [2023-01-27 21:20:44,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1644 transitions. [2023-01-27 21:20:44,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:20:44,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1644 transitions. [2023-01-27 21:20:44,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 56.689655172413794) internal successors, (1644), 29 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:44,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:44,915 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:44,915 INFO L175 Difference]: Start difference. First operand has 797 places, 2039 transitions, 52622 flow. Second operand 29 states and 1644 transitions. [2023-01-27 21:20:44,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 2108 transitions, 58804 flow [2023-01-27 21:20:51,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 2108 transitions, 57412 flow, removed 563 selfloop flow, removed 28 redundant places. [2023-01-27 21:20:51,482 INFO L231 Difference]: Finished difference. Result has 802 places, 2065 transitions, 53297 flow [2023-01-27 21:20:51,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=51230, PETRI_DIFFERENCE_MINUEND_PLACES=769, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=53297, PETRI_PLACES=802, PETRI_TRANSITIONS=2065} [2023-01-27 21:20:51,483 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 781 predicate places. [2023-01-27 21:20:51,483 INFO L495 AbstractCegarLoop]: Abstraction has has 802 places, 2065 transitions, 53297 flow [2023-01-27 21:20:51,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:51,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:20:51,484 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:20:51,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-01-27 21:20:51,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:20:51,689 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:20:51,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:20:51,689 INFO L85 PathProgramCache]: Analyzing trace with hash -518482499, now seen corresponding path program 60 times [2023-01-27 21:20:51,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:20:51,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440905050] [2023-01-27 21:20:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:20:51,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:20:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:20:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:20:52,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:20:52,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440905050] [2023-01-27 21:20:52,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440905050] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:20:52,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377047149] [2023-01-27 21:20:52,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:20:52,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:20:52,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:20:52,405 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:20:52,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-01-27 21:20:52,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:20:52,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:20:52,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-27 21:20:52,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:20:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:20:52,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:20:53,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:20:53,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-27 21:20:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:20:53,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377047149] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:20:53,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:20:53,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-01-27 21:20:53,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915907050] [2023-01-27 21:20:53,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:20:53,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 21:20:53,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:20:53,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 21:20:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 21:20:53,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:20:53,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 2065 transitions, 53297 flow. Second operand has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:20:53,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:20:53,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:20:53,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:21:01,765 INFO L130 PetriNetUnfolder]: 5504/10373 cut-off events. [2023-01-27 21:21:01,765 INFO L131 PetriNetUnfolder]: For 736199/736199 co-relation queries the response was YES. [2023-01-27 21:21:01,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135238 conditions, 10373 events. 5504/10373 cut-off events. For 736199/736199 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 85627 event pairs, 788 based on Foata normal form. 6/10379 useless extension candidates. Maximal degree in co-relation 134953. Up to 9592 conditions per place. [2023-01-27 21:21:01,923 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1844 selfloop transitions, 329 changer transitions 4/2177 dead transitions. [2023-01-27 21:21:01,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 2177 transitions, 61799 flow [2023-01-27 21:21:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 21:21:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 21:21:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1942 transitions. [2023-01-27 21:21:01,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2772701313535123 [2023-01-27 21:21:01,925 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1942 transitions. [2023-01-27 21:21:01,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1942 transitions. [2023-01-27 21:21:01,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:21:01,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1942 transitions. [2023-01-27 21:21:01,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.11764705882353) internal successors, (1942), 34 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:01,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:01,929 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:01,929 INFO L175 Difference]: Start difference. First operand has 802 places, 2065 transitions, 53297 flow. Second operand 34 states and 1942 transitions. [2023-01-27 21:21:01,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 2177 transitions, 61799 flow [2023-01-27 21:21:08,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 812 places, 2177 transitions, 60579 flow, removed 471 selfloop flow, removed 23 redundant places. [2023-01-27 21:21:08,896 INFO L231 Difference]: Finished difference. Result has 816 places, 2114 transitions, 56066 flow [2023-01-27 21:21:08,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=52149, PETRI_DIFFERENCE_MINUEND_PLACES=779, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=56066, PETRI_PLACES=816, PETRI_TRANSITIONS=2114} [2023-01-27 21:21:08,898 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 795 predicate places. [2023-01-27 21:21:08,898 INFO L495 AbstractCegarLoop]: Abstraction has has 816 places, 2114 transitions, 56066 flow [2023-01-27 21:21:08,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:08,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:21:08,898 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:21:08,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-01-27 21:21:09,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-01-27 21:21:09,103 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:21:09,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:21:09,103 INFO L85 PathProgramCache]: Analyzing trace with hash 32777677, now seen corresponding path program 61 times [2023-01-27 21:21:09,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:21:09,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122115262] [2023-01-27 21:21:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:21:09,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:21:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:21:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:21:09,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:21:09,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122115262] [2023-01-27 21:21:09,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122115262] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:21:09,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418964373] [2023-01-27 21:21:09,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:21:09,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:21:09,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:21:09,763 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:21:09,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-01-27 21:21:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:21:09,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-01-27 21:21:09,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:21:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:21:10,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-27 21:21:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:21:10,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:21:10,428 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse4 (+ c_~A~0.offset 8)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_2287 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2287) c_~A~0.base))) (<= (+ .cse0 c_~counter~0 (select .cse1 .cse2)) (+ (select .cse1 .cse3) (select .cse1 c_~A~0.offset) (select .cse1 .cse4))))) (forall ((v_ArrVal_2287 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2287) c_~A~0.base))) (< (+ (select .cse5 .cse3) (select .cse5 c_~A~0.offset) (select .cse5 .cse4)) (+ .cse0 c_~counter~0 (select .cse5 .cse2) 1))))))) is different from false [2023-01-27 21:21:10,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:21:10,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 125 [2023-01-27 21:21:10,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:21:10,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-01-27 21:21:10,555 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:21:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-01-27 21:21:10,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418964373] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:21:10,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:21:10,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-01-27 21:21:10,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638783703] [2023-01-27 21:21:10,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:21:10,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-27 21:21:10,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:21:10,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-27 21:21:10,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1254, Unknown=12, NotChecked=72, Total=1482 [2023-01-27 21:21:10,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-01-27 21:21:10,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 816 places, 2114 transitions, 56066 flow. Second operand has 39 states, 39 states have (on average 57.43589743589744) internal successors, (2240), 39 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:10,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:21:10,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-01-27 21:21:10,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:21:19,964 INFO L130 PetriNetUnfolder]: 5684/10739 cut-off events. [2023-01-27 21:21:19,964 INFO L131 PetriNetUnfolder]: For 783085/783085 co-relation queries the response was YES. [2023-01-27 21:21:20,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141292 conditions, 10739 events. 5684/10739 cut-off events. For 783085/783085 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 89633 event pairs, 739 based on Foata normal form. 4/10743 useless extension candidates. Maximal degree in co-relation 141002. Up to 9397 conditions per place. [2023-01-27 21:21:20,145 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1805 selfloop transitions, 446 changer transitions 2/2253 dead transitions. [2023-01-27 21:21:20,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 2253 transitions, 64143 flow [2023-01-27 21:21:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 21:21:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 21:21:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2068 transitions. [2023-01-27 21:21:20,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2952598515134209 [2023-01-27 21:21:20,147 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2068 transitions. [2023-01-27 21:21:20,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2068 transitions. [2023-01-27 21:21:20,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:21:20,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2068 transitions. [2023-01-27 21:21:20,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 60.8235294117647) internal successors, (2068), 34 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:20,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:20,151 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:20,151 INFO L175 Difference]: Start difference. First operand has 816 places, 2114 transitions, 56066 flow. Second operand 34 states and 2068 transitions. [2023-01-27 21:21:20,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 2253 transitions, 64143 flow [2023-01-27 21:21:28,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 2253 transitions, 62145 flow, removed 869 selfloop flow, removed 24 redundant places. [2023-01-27 21:21:28,337 INFO L231 Difference]: Finished difference. Result has 829 places, 2162 transitions, 57265 flow [2023-01-27 21:21:28,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=54068, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=57265, PETRI_PLACES=829, PETRI_TRANSITIONS=2162} [2023-01-27 21:21:28,338 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 808 predicate places. [2023-01-27 21:21:28,338 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2162 transitions, 57265 flow [2023-01-27 21:21:28,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 57.43589743589744) internal successors, (2240), 39 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:28,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:21:28,339 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:21:28,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-01-27 21:21:28,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-01-27 21:21:28,543 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:21:28,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:21:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1882723549, now seen corresponding path program 62 times [2023-01-27 21:21:28,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:21:28,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761911717] [2023-01-27 21:21:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:21:28,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:21:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:21:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:21:29,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:21:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761911717] [2023-01-27 21:21:29,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761911717] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:21:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92476835] [2023-01-27 21:21:29,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:21:29,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:21:29,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:21:29,231 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:21:29,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-01-27 21:21:29,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:21:29,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:21:29,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 104 conjunts are in the unsatisfiable core [2023-01-27 21:21:29,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:21:29,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:21:29,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 21:21:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:21:29,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:21:29,858 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset .cse6)) (.cse4 (+ c_~A~0.offset .cse6 4)) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2326 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2326) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ (select .cse0 .cse3) c_~counter~0 (select .cse0 .cse4) 1)))) (forall ((v_ArrVal_2326 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2326) c_~A~0.base))) (<= (+ (select .cse5 .cse3) c_~counter~0 (select .cse5 .cse4)) (+ (select .cse5 c_~A~0.offset) (select .cse5 .cse1) (select .cse5 .cse2)))))))) is different from false [2023-01-27 21:21:29,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:21:29,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 132 [2023-01-27 21:21:29,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:21:29,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-01-27 21:21:30,099 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:21:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:21:30,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92476835] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:21:30,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:21:30,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-01-27 21:21:30,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837823953] [2023-01-27 21:21:30,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:21:30,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-27 21:21:30,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:21:30,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-27 21:21:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1129, Unknown=1, NotChecked=68, Total=1332 [2023-01-27 21:21:30,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-01-27 21:21:30,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2162 transitions, 57265 flow. Second operand has 37 states, 37 states have (on average 57.5945945945946) internal successors, (2131), 37 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:30,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:21:30,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-01-27 21:21:30,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:21:39,055 INFO L130 PetriNetUnfolder]: 5825/11016 cut-off events. [2023-01-27 21:21:39,055 INFO L131 PetriNetUnfolder]: For 813105/813105 co-relation queries the response was YES. [2023-01-27 21:21:39,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145729 conditions, 11016 events. 5825/11016 cut-off events. For 813105/813105 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 92532 event pairs, 880 based on Foata normal form. 6/11022 useless extension candidates. Maximal degree in co-relation 145437. Up to 10004 conditions per place. [2023-01-27 21:21:39,234 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1903 selfloop transitions, 346 changer transitions 1/2250 dead transitions. [2023-01-27 21:21:39,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 851 places, 2250 transitions, 64619 flow [2023-01-27 21:21:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 21:21:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 21:21:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1395 transitions. [2023-01-27 21:21:39,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29442802870409457 [2023-01-27 21:21:39,236 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1395 transitions. [2023-01-27 21:21:39,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1395 transitions. [2023-01-27 21:21:39,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:21:39,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1395 transitions. [2023-01-27 21:21:39,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 60.65217391304348) internal successors, (1395), 23 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:39,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 206.0) internal successors, (4944), 24 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:39,239 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 206.0) internal successors, (4944), 24 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:39,239 INFO L175 Difference]: Start difference. First operand has 829 places, 2162 transitions, 57265 flow. Second operand 23 states and 1395 transitions. [2023-01-27 21:21:39,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 851 places, 2250 transitions, 64619 flow [2023-01-27 21:21:48,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 827 places, 2250 transitions, 63476 flow, removed 381 selfloop flow, removed 24 redundant places. [2023-01-27 21:21:48,124 INFO L231 Difference]: Finished difference. Result has 833 places, 2206 transitions, 59248 flow [2023-01-27 21:21:48,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=56152, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=59248, PETRI_PLACES=833, PETRI_TRANSITIONS=2206} [2023-01-27 21:21:48,125 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 812 predicate places. [2023-01-27 21:21:48,125 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 2206 transitions, 59248 flow [2023-01-27 21:21:48,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 57.5945945945946) internal successors, (2131), 37 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:21:48,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:21:48,126 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:21:48,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-01-27 21:21:48,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:21:48,331 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:21:48,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:21:48,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1514671673, now seen corresponding path program 63 times [2023-01-27 21:21:48,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:21:48,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998899525] [2023-01-27 21:21:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:21:48,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:21:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:21:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:21:49,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:21:49,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998899525] [2023-01-27 21:21:49,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998899525] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:21:49,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591304693] [2023-01-27 21:21:49,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:21:49,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:21:49,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:21:49,177 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:21:49,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-01-27 21:21:49,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 21:21:49,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:21:49,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-01-27 21:21:49,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:21:49,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 21:21:49,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:21:49,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:21:49,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:21:49,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 51 [2023-01-27 21:21:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:21:50,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:21:53,464 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_subst_34 Int) (v_ArrVal_2368 (Array Int Int))) (or (<= c_~N~0 (+ v_subst_34 1)) (< (+ 2 v_subst_34) c_~N~0) (forall ((v_subst_36 Int)) (or (< (+ v_subst_36 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2368) c_~A~0.base))) (< (+ (select .cse0 (+ c_~A~0.offset (* v_subst_36 4))) (select .cse0 .cse1)) (let ((.cse2 (* v_subst_34 4))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse2)) (select .cse0 (+ c_~A~0.offset .cse2 4)) 1)))) (<= c_~N~0 v_subst_36))))) (forall ((v_ArrVal_2368 (Array Int Int)) (v_subst_33 Int)) (or (<= c_~N~0 (+ v_subst_33 1)) (< (+ 2 v_subst_33) c_~N~0) (forall ((v_subst_35 Int)) (or (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2368) c_~A~0.base))) (<= (let ((.cse4 (* v_subst_33 4))) (+ (select .cse3 (+ c_~A~0.offset .cse4)) c_~counter~0 (select .cse3 (+ c_~A~0.offset .cse4 4)))) (+ (select .cse3 .cse1) (select .cse3 (+ c_~A~0.offset (* v_subst_35 4)))))) (<= c_~N~0 v_subst_35) (< (+ v_subst_35 1) c_~N~0))))))) is different from false [2023-01-27 21:21:59,681 WARN L222 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 21:21:59,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:21:59,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 77 [2023-01-27 21:21:59,756 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-01-27 21:21:59,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 155 [2023-01-27 21:21:59,782 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-01-27 21:21:59,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 132 treesize of output 106 [2023-01-27 21:21:59,809 INFO L321 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-01-27 21:21:59,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 50 [2023-01-27 21:21:59,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:21:59,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 76 [2023-01-27 21:21:59,921 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-01-27 21:21:59,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 334 treesize of output 280 [2023-01-27 21:21:59,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:21:59,932 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:21:59,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:21:59,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 21 [2023-01-27 21:21:59,969 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-01-27 21:21:59,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2023-01-27 21:22:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:22:00,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591304693] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:22:00,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:22:00,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2023-01-27 21:22:00,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990744370] [2023-01-27 21:22:00,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:22:00,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-01-27 21:22:00,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:22:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-01-27 21:22:00,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1851, Unknown=1, NotChecked=88, Total=2162 [2023-01-27 21:22:00,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:22:00,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 833 places, 2206 transitions, 59248 flow. Second operand has 47 states, 47 states have (on average 54.297872340425535) internal successors, (2552), 47 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:22:00,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:22:00,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:22:00,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:22:14,251 INFO L130 PetriNetUnfolder]: 5952/11260 cut-off events. [2023-01-27 21:22:14,251 INFO L131 PetriNetUnfolder]: For 841595/841595 co-relation queries the response was YES. [2023-01-27 21:22:14,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150029 conditions, 11260 events. 5952/11260 cut-off events. For 841595/841595 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 95003 event pairs, 117 based on Foata normal form. 2/11262 useless extension candidates. Maximal degree in co-relation 149730. Up to 5602 conditions per place. [2023-01-27 21:22:14,437 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 1529 selfloop transitions, 856 changer transitions 24/2409 dead transitions. [2023-01-27 21:22:14,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 899 places, 2409 transitions, 68483 flow [2023-01-27 21:22:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-01-27 21:22:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-01-27 21:22:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3811 transitions. [2023-01-27 21:22:14,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27611940298507465 [2023-01-27 21:22:14,440 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3811 transitions. [2023-01-27 21:22:14,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3811 transitions. [2023-01-27 21:22:14,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:22:14,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3811 transitions. [2023-01-27 21:22:14,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 56.88059701492537) internal successors, (3811), 67 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:22:14,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 206.0) internal successors, (14008), 68 states have internal predecessors, (14008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:22:14,449 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 206.0) internal successors, (14008), 68 states have internal predecessors, (14008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:22:14,449 INFO L175 Difference]: Start difference. First operand has 833 places, 2206 transitions, 59248 flow. Second operand 67 states and 3811 transitions. [2023-01-27 21:22:14,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 899 places, 2409 transitions, 68483 flow [2023-01-27 21:22:23,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 2409 transitions, 67104 flow, removed 543 selfloop flow, removed 13 redundant places. [2023-01-27 21:22:23,681 INFO L231 Difference]: Finished difference. Result has 899 places, 2285 transitions, 63501 flow [2023-01-27 21:22:23,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=57869, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=63501, PETRI_PLACES=899, PETRI_TRANSITIONS=2285} [2023-01-27 21:22:23,682 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 878 predicate places. [2023-01-27 21:22:23,682 INFO L495 AbstractCegarLoop]: Abstraction has has 899 places, 2285 transitions, 63501 flow [2023-01-27 21:22:23,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 54.297872340425535) internal successors, (2552), 47 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:22:23,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:22:23,682 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:22:23,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-01-27 21:22:23,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-01-27 21:22:23,888 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:22:23,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:22:23,888 INFO L85 PathProgramCache]: Analyzing trace with hash -566140601, now seen corresponding path program 64 times [2023-01-27 21:22:23,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:22:23,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709446944] [2023-01-27 21:22:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:22:23,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:22:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:22:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:22:24,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:22:24,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709446944] [2023-01-27 21:22:24,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709446944] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:22:24,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947339005] [2023-01-27 21:22:24,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:22:24,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:22:24,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:22:24,586 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:22:24,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-01-27 21:22:24,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:22:24,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:22:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-27 21:22:24,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:22:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:22:24,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:22:25,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:22:25,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-27 21:22:25,263 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-27 21:22:25,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-27 21:22:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:22:25,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947339005] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:22:25,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:22:25,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 30 [2023-01-27 21:22:25,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661948258] [2023-01-27 21:22:25,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:22:25,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 21:22:25,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:22:25,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 21:22:25,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2023-01-27 21:22:25,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:22:25,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 899 places, 2285 transitions, 63501 flow. Second operand has 32 states, 32 states have (on average 54.78125) internal successors, (1753), 32 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:22:25,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:22:25,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:22:25,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:22:35,782 INFO L130 PetriNetUnfolder]: 6082/11520 cut-off events. [2023-01-27 21:22:35,782 INFO L131 PetriNetUnfolder]: For 1088380/1088380 co-relation queries the response was YES. [2023-01-27 21:22:35,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164727 conditions, 11520 events. 6082/11520 cut-off events. For 1088380/1088380 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 97729 event pairs, 971 based on Foata normal form. 8/11528 useless extension candidates. Maximal degree in co-relation 164414. Up to 10928 conditions per place. [2023-01-27 21:22:35,990 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 2176 selfloop transitions, 202 changer transitions 2/2380 dead transitions. [2023-01-27 21:22:35,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 920 places, 2380 transitions, 71655 flow [2023-01-27 21:22:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 21:22:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 21:22:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1390 transitions. [2023-01-27 21:22:35,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28114886731391586 [2023-01-27 21:22:35,994 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1390 transitions. [2023-01-27 21:22:35,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1390 transitions. [2023-01-27 21:22:35,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:22:35,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1390 transitions. [2023-01-27 21:22:35,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.916666666666664) internal successors, (1390), 24 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:22:35,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 206.0) internal successors, (5150), 25 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:22:35,997 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 206.0) internal successors, (5150), 25 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:22:35,997 INFO L175 Difference]: Start difference. First operand has 899 places, 2285 transitions, 63501 flow. Second operand 24 states and 1390 transitions. [2023-01-27 21:22:35,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 920 places, 2380 transitions, 71655 flow [2023-01-27 21:22:47,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 885 places, 2380 transitions, 70106 flow, removed 680 selfloop flow, removed 35 redundant places. [2023-01-27 21:22:47,711 INFO L231 Difference]: Finished difference. Result has 889 places, 2322 transitions, 64864 flow [2023-01-27 21:22:47,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=61964, PETRI_DIFFERENCE_MINUEND_PLACES=862, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=64864, PETRI_PLACES=889, PETRI_TRANSITIONS=2322} [2023-01-27 21:22:47,712 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 868 predicate places. [2023-01-27 21:22:47,713 INFO L495 AbstractCegarLoop]: Abstraction has has 889 places, 2322 transitions, 64864 flow [2023-01-27 21:22:47,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 54.78125) internal successors, (1753), 32 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:22:47,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:22:47,713 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:22:47,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-01-27 21:22:47,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-01-27 21:22:47,918 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:22:47,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:22:47,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1769634401, now seen corresponding path program 65 times [2023-01-27 21:22:47,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:22:47,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088460182] [2023-01-27 21:22:47,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:22:47,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:22:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:22:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:22:48,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:22:48,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088460182] [2023-01-27 21:22:48,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088460182] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:22:48,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276438334] [2023-01-27 21:22:48,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:22:48,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:22:48,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:22:48,620 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:22:48,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-01-27 21:22:48,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 21:22:48,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:22:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-27 21:22:48,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:22:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:22:49,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:22:49,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:22:49,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-27 21:22:49,372 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-27 21:22:49,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-27 21:22:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:22:49,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276438334] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:22:49,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:22:49,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-27 21:22:49,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476414834] [2023-01-27 21:22:49,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:22:49,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 21:22:49,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:22:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 21:22:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 21:22:49,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:22:49,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 889 places, 2322 transitions, 64864 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:22:49,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:22:49,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:22:49,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:23:00,585 INFO L130 PetriNetUnfolder]: 6367/12106 cut-off events. [2023-01-27 21:23:00,585 INFO L131 PetriNetUnfolder]: For 1214352/1214352 co-relation queries the response was YES. [2023-01-27 21:23:00,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177031 conditions, 12106 events. 6367/12106 cut-off events. For 1214352/1214352 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 103963 event pairs, 1076 based on Foata normal form. 9/12115 useless extension candidates. Maximal degree in co-relation 176718. Up to 11124 conditions per place. [2023-01-27 21:23:00,810 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 2183 selfloop transitions, 339 changer transitions 6/2528 dead transitions. [2023-01-27 21:23:00,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 924 places, 2528 transitions, 79157 flow [2023-01-27 21:23:00,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 21:23:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 21:23:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2094 transitions. [2023-01-27 21:23:00,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28236245954692557 [2023-01-27 21:23:00,812 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2094 transitions. [2023-01-27 21:23:00,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2094 transitions. [2023-01-27 21:23:00,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:23:00,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2094 transitions. [2023-01-27 21:23:00,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 58.166666666666664) internal successors, (2094), 36 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:00,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:00,817 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:00,817 INFO L175 Difference]: Start difference. First operand has 889 places, 2322 transitions, 64864 flow. Second operand 36 states and 2094 transitions. [2023-01-27 21:23:00,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 924 places, 2528 transitions, 79157 flow [2023-01-27 21:23:13,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 911 places, 2528 transitions, 77176 flow, removed 885 selfloop flow, removed 13 redundant places. [2023-01-27 21:23:13,232 INFO L231 Difference]: Finished difference. Result has 919 places, 2410 transitions, 70056 flow [2023-01-27 21:23:13,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=62883, PETRI_DIFFERENCE_MINUEND_PLACES=876, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2033, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=70056, PETRI_PLACES=919, PETRI_TRANSITIONS=2410} [2023-01-27 21:23:13,234 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 898 predicate places. [2023-01-27 21:23:13,234 INFO L495 AbstractCegarLoop]: Abstraction has has 919 places, 2410 transitions, 70056 flow [2023-01-27 21:23:13,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:13,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:23:13,235 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:23:13,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-01-27 21:23:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-01-27 21:23:13,441 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:23:13,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:23:13,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1644674265, now seen corresponding path program 66 times [2023-01-27 21:23:13,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:23:13,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285681727] [2023-01-27 21:23:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:23:13,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:23:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:23:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:23:14,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:23:14,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285681727] [2023-01-27 21:23:14,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285681727] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:23:14,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656315156] [2023-01-27 21:23:14,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:23:14,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:23:14,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:23:14,140 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:23:14,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-01-27 21:23:14,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:23:14,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:23:14,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-27 21:23:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:23:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:23:14,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:23:14,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:23:14,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-27 21:23:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:23:14,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656315156] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:23:14,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:23:14,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-01-27 21:23:14,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615340674] [2023-01-27 21:23:14,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:23:14,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 21:23:14,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:23:14,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 21:23:14,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 21:23:14,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:23:14,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 919 places, 2410 transitions, 70056 flow. Second operand has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:14,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:23:14,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:23:14,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:23:26,827 INFO L130 PetriNetUnfolder]: 6427/12234 cut-off events. [2023-01-27 21:23:26,827 INFO L131 PetriNetUnfolder]: For 1231048/1231048 co-relation queries the response was YES. [2023-01-27 21:23:26,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178784 conditions, 12234 events. 6427/12234 cut-off events. For 1231048/1231048 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 105296 event pairs, 1106 based on Foata normal form. 4/12238 useless extension candidates. Maximal degree in co-relation 178462. Up to 11405 conditions per place. [2023-01-27 21:23:27,057 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 2125 selfloop transitions, 359 changer transitions 2/2486 dead transitions. [2023-01-27 21:23:27,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 2486 transitions, 77357 flow [2023-01-27 21:23:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 21:23:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 21:23:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1708 transitions. [2023-01-27 21:23:27,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27637540453074433 [2023-01-27 21:23:27,059 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1708 transitions. [2023-01-27 21:23:27,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1708 transitions. [2023-01-27 21:23:27,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:23:27,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1708 transitions. [2023-01-27 21:23:27,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 56.93333333333333) internal successors, (1708), 30 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:27,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:27,063 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:27,063 INFO L175 Difference]: Start difference. First operand has 919 places, 2410 transitions, 70056 flow. Second operand 30 states and 1708 transitions. [2023-01-27 21:23:27,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 2486 transitions, 77357 flow [2023-01-27 21:23:39,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 931 places, 2486 transitions, 73393 flow, removed 1883 selfloop flow, removed 17 redundant places. [2023-01-27 21:23:40,034 INFO L231 Difference]: Finished difference. Result has 937 places, 2436 transitions, 68590 flow [2023-01-27 21:23:40,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=66092, PETRI_DIFFERENCE_MINUEND_PLACES=902, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2056, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=68590, PETRI_PLACES=937, PETRI_TRANSITIONS=2436} [2023-01-27 21:23:40,036 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 916 predicate places. [2023-01-27 21:23:40,036 INFO L495 AbstractCegarLoop]: Abstraction has has 937 places, 2436 transitions, 68590 flow [2023-01-27 21:23:40,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:40,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:23:40,036 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:23:40,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-01-27 21:23:40,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2023-01-27 21:23:40,241 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:23:40,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:23:40,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1023542659, now seen corresponding path program 67 times [2023-01-27 21:23:40,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:23:40,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302257260] [2023-01-27 21:23:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:23:40,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:23:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:23:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:23:40,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:23:40,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302257260] [2023-01-27 21:23:40,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302257260] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:23:40,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407637390] [2023-01-27 21:23:40,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:23:40,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:23:40,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:23:40,953 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:23:40,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-01-27 21:23:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:23:41,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-27 21:23:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:23:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:23:41,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:23:41,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:23:41,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-27 21:23:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:23:41,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407637390] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:23:41,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:23:41,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-27 21:23:41,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074950534] [2023-01-27 21:23:41,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:23:41,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 21:23:41,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:23:41,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 21:23:41,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 21:23:41,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:23:41,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 937 places, 2436 transitions, 68590 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:41,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:23:41,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:23:41,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:23:53,955 INFO L130 PetriNetUnfolder]: 6586/12541 cut-off events. [2023-01-27 21:23:53,955 INFO L131 PetriNetUnfolder]: For 1233739/1233739 co-relation queries the response was YES. [2023-01-27 21:23:54,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182289 conditions, 12541 events. 6586/12541 cut-off events. For 1233739/1233739 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 107937 event pairs, 1084 based on Foata normal form. 4/12545 useless extension candidates. Maximal degree in co-relation 181960. Up to 11734 conditions per place. [2023-01-27 21:23:54,186 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 2237 selfloop transitions, 338 changer transitions 3/2578 dead transitions. [2023-01-27 21:23:54,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 972 places, 2578 transitions, 79088 flow [2023-01-27 21:23:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 21:23:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 21:23:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2067 transitions. [2023-01-27 21:23:54,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27872168284789645 [2023-01-27 21:23:54,188 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2067 transitions. [2023-01-27 21:23:54,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2067 transitions. [2023-01-27 21:23:54,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:23:54,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2067 transitions. [2023-01-27 21:23:54,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.416666666666664) internal successors, (2067), 36 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:54,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:54,192 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:23:54,193 INFO L175 Difference]: Start difference. First operand has 937 places, 2436 transitions, 68590 flow. Second operand 36 states and 2067 transitions. [2023-01-27 21:23:54,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 972 places, 2578 transitions, 79088 flow [2023-01-27 21:24:07,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 952 places, 2578 transitions, 77516 flow, removed 612 selfloop flow, removed 20 redundant places. [2023-01-27 21:24:07,264 INFO L231 Difference]: Finished difference. Result has 958 places, 2508 transitions, 71889 flow [2023-01-27 21:24:07,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=67060, PETRI_DIFFERENCE_MINUEND_PLACES=917, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=71889, PETRI_PLACES=958, PETRI_TRANSITIONS=2508} [2023-01-27 21:24:07,266 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 937 predicate places. [2023-01-27 21:24:07,266 INFO L495 AbstractCegarLoop]: Abstraction has has 958 places, 2508 transitions, 71889 flow [2023-01-27 21:24:07,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:24:07,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:24:07,266 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:24:07,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-01-27 21:24:07,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:24:07,472 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:24:07,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:24:07,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1920231801, now seen corresponding path program 68 times [2023-01-27 21:24:07,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:24:07,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330736965] [2023-01-27 21:24:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:24:07,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:24:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:24:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:24:08,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:24:08,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330736965] [2023-01-27 21:24:08,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330736965] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:24:08,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932563288] [2023-01-27 21:24:08,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:24:08,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:24:08,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:24:08,053 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:24:08,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-01-27 21:24:08,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:24:08,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:24:08,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-27 21:24:08,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:24:08,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:24:08,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-27 21:24:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:24:08,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:24:09,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:24:09,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 109 [2023-01-27 21:24:09,793 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-01-27 21:24:09,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 66 [2023-01-27 21:24:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:24:10,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932563288] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:24:10,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:24:10,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-01-27 21:24:10,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067106220] [2023-01-27 21:24:10,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:24:10,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-27 21:24:10,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:24:10,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-27 21:24:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2023-01-27 21:24:10,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:24:10,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 958 places, 2508 transitions, 71889 flow. Second operand has 42 states, 42 states have (on average 61.45238095238095) internal successors, (2581), 42 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:24:10,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:24:10,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:24:10,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:24:22,486 INFO L130 PetriNetUnfolder]: 6634/12664 cut-off events. [2023-01-27 21:24:22,486 INFO L131 PetriNetUnfolder]: For 1267057/1267057 co-relation queries the response was YES. [2023-01-27 21:24:22,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184836 conditions, 12664 events. 6634/12664 cut-off events. For 1267057/1267057 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 109850 event pairs, 1109 based on Foata normal form. 3/12667 useless extension candidates. Maximal degree in co-relation 184500. Up to 11514 conditions per place. [2023-01-27 21:24:22,710 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2192 selfloop transitions, 391 changer transitions 6/2589 dead transitions. [2023-01-27 21:24:22,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 997 places, 2589 transitions, 79428 flow [2023-01-27 21:24:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 21:24:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 21:24:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2559 transitions. [2023-01-27 21:24:22,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3105582524271845 [2023-01-27 21:24:22,713 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2559 transitions. [2023-01-27 21:24:22,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2559 transitions. [2023-01-27 21:24:22,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:24:22,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2559 transitions. [2023-01-27 21:24:22,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 63.975) internal successors, (2559), 40 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:24:22,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:24:22,718 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:24:22,718 INFO L175 Difference]: Start difference. First operand has 958 places, 2508 transitions, 71889 flow. Second operand 40 states and 2559 transitions. [2023-01-27 21:24:22,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 997 places, 2589 transitions, 79428 flow [2023-01-27 21:24:36,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 973 places, 2589 transitions, 77525 flow, removed 835 selfloop flow, removed 24 redundant places. [2023-01-27 21:24:36,729 INFO L231 Difference]: Finished difference. Result has 977 places, 2523 transitions, 72334 flow [2023-01-27 21:24:36,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=70294, PETRI_DIFFERENCE_MINUEND_PLACES=934, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=72334, PETRI_PLACES=977, PETRI_TRANSITIONS=2523} [2023-01-27 21:24:36,730 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 956 predicate places. [2023-01-27 21:24:36,730 INFO L495 AbstractCegarLoop]: Abstraction has has 977 places, 2523 transitions, 72334 flow [2023-01-27 21:24:36,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 61.45238095238095) internal successors, (2581), 42 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:24:36,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:24:36,730 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:24:36,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-01-27 21:24:36,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:24:36,936 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:24:36,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:24:36,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1988763423, now seen corresponding path program 69 times [2023-01-27 21:24:36,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:24:36,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144822501] [2023-01-27 21:24:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:24:36,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:24:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:24:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:24:37,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:24:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144822501] [2023-01-27 21:24:37,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144822501] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:24:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909732715] [2023-01-27 21:24:37,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:24:37,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:24:37,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:24:37,563 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:24:37,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-01-27 21:24:37,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 21:24:37,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:24:37,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 112 conjunts are in the unsatisfiable core [2023-01-27 21:24:37,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:24:38,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:24:38,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 51 [2023-01-27 21:24:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:24:38,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:24:38,929 INFO L321 Elim1Store]: treesize reduction 42, result has 64.1 percent of original size [2023-01-27 21:24:38,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 85 [2023-01-27 21:24:39,062 INFO L321 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2023-01-27 21:24:39,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 60 [2023-01-27 21:24:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:24:39,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909732715] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:24:39,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:24:39,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-27 21:24:39,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566565294] [2023-01-27 21:24:39,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:24:39,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-27 21:24:39,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:24:39,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-27 21:24:39,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2023-01-27 21:24:39,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:24:39,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 977 places, 2523 transitions, 72334 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:24:39,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:24:39,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:24:39,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:24:53,974 INFO L130 PetriNetUnfolder]: 6830/13030 cut-off events. [2023-01-27 21:24:53,975 INFO L131 PetriNetUnfolder]: For 1335517/1335517 co-relation queries the response was YES. [2023-01-27 21:24:54,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191821 conditions, 13030 events. 6830/13030 cut-off events. For 1335517/1335517 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 114426 event pairs, 450 based on Foata normal form. 4/13034 useless extension candidates. Maximal degree in co-relation 191482. Up to 7910 conditions per place. [2023-01-27 21:24:54,201 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 1860 selfloop transitions, 853 changer transitions 44/2757 dead transitions. [2023-01-27 21:24:54,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1020 places, 2757 transitions, 83980 flow [2023-01-27 21:24:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-27 21:24:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-27 21:24:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2539 transitions. [2023-01-27 21:24:54,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28011915269196824 [2023-01-27 21:24:54,204 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2539 transitions. [2023-01-27 21:24:54,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2539 transitions. [2023-01-27 21:24:54,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:24:54,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2539 transitions. [2023-01-27 21:24:54,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.70454545454545) internal successors, (2539), 44 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:24:54,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:24:54,209 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:24:54,209 INFO L175 Difference]: Start difference. First operand has 977 places, 2523 transitions, 72334 flow. Second operand 44 states and 2539 transitions. [2023-01-27 21:24:54,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1020 places, 2757 transitions, 83980 flow [2023-01-27 21:25:08,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 988 places, 2757 transitions, 83250 flow, removed 187 selfloop flow, removed 32 redundant places. [2023-01-27 21:25:08,893 INFO L231 Difference]: Finished difference. Result has 992 places, 2595 transitions, 77374 flow [2023-01-27 21:25:08,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=71616, PETRI_DIFFERENCE_MINUEND_PLACES=945, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=77374, PETRI_PLACES=992, PETRI_TRANSITIONS=2595} [2023-01-27 21:25:08,895 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 971 predicate places. [2023-01-27 21:25:08,895 INFO L495 AbstractCegarLoop]: Abstraction has has 992 places, 2595 transitions, 77374 flow [2023-01-27 21:25:08,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:25:08,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:25:08,895 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:25:08,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-01-27 21:25:09,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:25:09,096 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:25:09,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:25:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash -886443231, now seen corresponding path program 70 times [2023-01-27 21:25:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:25:09,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66271987] [2023-01-27 21:25:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:25:09,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:25:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:25:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:25:09,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:25:09,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66271987] [2023-01-27 21:25:09,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66271987] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:25:09,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182687416] [2023-01-27 21:25:09,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:25:09,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:25:09,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:25:09,961 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:25:09,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-01-27 21:25:10,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:25:10,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:25:10,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-27 21:25:10,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:25:10,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:25:10,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-27 21:25:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:25:10,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:25:11,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:25:11,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 110 [2023-01-27 21:25:11,475 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-01-27 21:25:11,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 65 [2023-01-27 21:25:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:25:11,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182687416] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:25:11,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:25:11,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-01-27 21:25:11,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096283088] [2023-01-27 21:25:11,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:25:11,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-27 21:25:11,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:25:11,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-27 21:25:11,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2023-01-27 21:25:11,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:25:11,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 992 places, 2595 transitions, 77374 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:25:11,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:25:11,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:25:11,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:25:29,032 INFO L130 PetriNetUnfolder]: 7006/13378 cut-off events. [2023-01-27 21:25:29,032 INFO L131 PetriNetUnfolder]: For 1436568/1436568 co-relation queries the response was YES. [2023-01-27 21:25:29,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202041 conditions, 13378 events. 7006/13378 cut-off events. For 1436568/1436568 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 116507 event pairs, 1057 based on Foata normal form. 6/13384 useless extension candidates. Maximal degree in co-relation 201697. Up to 12380 conditions per place. [2023-01-27 21:25:29,286 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 2322 selfloop transitions, 438 changer transitions 6/2766 dead transitions. [2023-01-27 21:25:29,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1047 places, 2766 transitions, 88570 flow [2023-01-27 21:25:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-01-27 21:25:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-01-27 21:25:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3185 transitions. [2023-01-27 21:25:29,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27609223300970875 [2023-01-27 21:25:29,289 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3185 transitions. [2023-01-27 21:25:29,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3185 transitions. [2023-01-27 21:25:29,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:25:29,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3185 transitions. [2023-01-27 21:25:29,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 56.875) internal successors, (3185), 56 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:25:29,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 206.0) internal successors, (11742), 57 states have internal predecessors, (11742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:25:29,297 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 206.0) internal successors, (11742), 57 states have internal predecessors, (11742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:25:29,297 INFO L175 Difference]: Start difference. First operand has 992 places, 2595 transitions, 77374 flow. Second operand 56 states and 3185 transitions. [2023-01-27 21:25:29,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1047 places, 2766 transitions, 88570 flow [2023-01-27 21:25:45,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1024 places, 2766 transitions, 87348 flow, removed 538 selfloop flow, removed 23 redundant places. [2023-01-27 21:25:45,408 INFO L231 Difference]: Finished difference. Result has 1030 places, 2676 transitions, 81638 flow [2023-01-27 21:25:45,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=76168, PETRI_DIFFERENCE_MINUEND_PLACES=969, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=81638, PETRI_PLACES=1030, PETRI_TRANSITIONS=2676} [2023-01-27 21:25:45,410 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1009 predicate places. [2023-01-27 21:25:45,410 INFO L495 AbstractCegarLoop]: Abstraction has has 1030 places, 2676 transitions, 81638 flow [2023-01-27 21:25:45,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:25:45,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:25:45,410 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:25:45,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-01-27 21:25:45,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-01-27 21:25:45,615 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:25:45,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:25:45,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2121343109, now seen corresponding path program 71 times [2023-01-27 21:25:45,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:25:45,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597457707] [2023-01-27 21:25:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:25:45,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:25:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:25:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:25:46,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:25:46,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597457707] [2023-01-27 21:25:46,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597457707] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:25:46,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340720694] [2023-01-27 21:25:46,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:25:46,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:25:46,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:25:46,236 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:25:46,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-01-27 21:25:46,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:25:46,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:25:46,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-01-27 21:25:46,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:25:46,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:25:46,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-27 21:25:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:25:46,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:25:47,147 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse4 (+ c_~A~0.offset 8)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_2673 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2673) c_~A~0.base))) (<= (+ .cse0 (select .cse1 .cse2) c_~counter~0) (+ (select .cse1 .cse3) (select .cse1 c_~A~0.offset) (select .cse1 .cse4))))) (forall ((v_ArrVal_2673 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2673) c_~A~0.base))) (< (+ (select .cse5 .cse3) (select .cse5 c_~A~0.offset) (select .cse5 .cse4)) (+ .cse0 (select .cse5 .cse2) c_~counter~0 1))))))) is different from false [2023-01-27 21:25:47,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:25:47,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 125 [2023-01-27 21:25:47,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:25:47,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-01-27 21:25:47,366 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:25:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-01-27 21:25:47,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340720694] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:25:47,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:25:47,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-01-27 21:25:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348117714] [2023-01-27 21:25:47,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:25:47,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-27 21:25:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:25:47,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-27 21:25:47,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1240, Unknown=17, NotChecked=72, Total=1482 [2023-01-27 21:25:47,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-01-27 21:25:47,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1030 places, 2676 transitions, 81638 flow. Second operand has 39 states, 39 states have (on average 57.43589743589744) internal successors, (2240), 39 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:25:47,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:25:47,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-01-27 21:25:47,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:26:02,164 INFO L130 PetriNetUnfolder]: 7112/13561 cut-off events. [2023-01-27 21:26:02,164 INFO L131 PetriNetUnfolder]: For 1478107/1478107 co-relation queries the response was YES. [2023-01-27 21:26:02,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206749 conditions, 13561 events. 7112/13561 cut-off events. For 1478107/1478107 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 118177 event pairs, 1053 based on Foata normal form. 6/13567 useless extension candidates. Maximal degree in co-relation 206398. Up to 11961 conditions per place. [2023-01-27 21:26:02,413 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 2196 selfloop transitions, 582 changer transitions 1/2779 dead transitions. [2023-01-27 21:26:02,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1060 places, 2779 transitions, 90641 flow [2023-01-27 21:26:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 21:26:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 21:26:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1869 transitions. [2023-01-27 21:26:02,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2926714688380833 [2023-01-27 21:26:02,426 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1869 transitions. [2023-01-27 21:26:02,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1869 transitions. [2023-01-27 21:26:02,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:26:02,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1869 transitions. [2023-01-27 21:26:02,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 60.29032258064516) internal successors, (1869), 31 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:26:02,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:26:02,430 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:26:02,431 INFO L175 Difference]: Start difference. First operand has 1030 places, 2676 transitions, 81638 flow. Second operand 31 states and 1869 transitions. [2023-01-27 21:26:02,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1060 places, 2779 transitions, 90641 flow [2023-01-27 21:26:18,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1027 places, 2779 transitions, 88490 flow, removed 952 selfloop flow, removed 33 redundant places. [2023-01-27 21:26:18,280 INFO L231 Difference]: Finished difference. Result has 1031 places, 2722 transitions, 83408 flow [2023-01-27 21:26:18,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=79487, PETRI_DIFFERENCE_MINUEND_PLACES=997, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=83408, PETRI_PLACES=1031, PETRI_TRANSITIONS=2722} [2023-01-27 21:26:18,285 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1010 predicate places. [2023-01-27 21:26:18,285 INFO L495 AbstractCegarLoop]: Abstraction has has 1031 places, 2722 transitions, 83408 flow [2023-01-27 21:26:18,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 57.43589743589744) internal successors, (2240), 39 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:26:18,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:26:18,286 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:26:18,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-01-27 21:26:18,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:26:18,491 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:26:18,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:26:18,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1868066389, now seen corresponding path program 72 times [2023-01-27 21:26:18,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:26:18,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859276580] [2023-01-27 21:26:18,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:26:18,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:26:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:26:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:26:19,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:26:19,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859276580] [2023-01-27 21:26:19,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859276580] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:26:19,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881534196] [2023-01-27 21:26:19,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:26:19,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:26:19,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:26:19,026 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:26:19,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-01-27 21:26:19,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 21:26:19,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:26:19,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-27 21:26:19,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:26:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:26:19,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:26:19,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:26:19,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-27 21:26:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:26:19,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881534196] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:26:19,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:26:19,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-01-27 21:26:19,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569407681] [2023-01-27 21:26:19,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:26:19,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 21:26:19,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:26:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 21:26:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2023-01-27 21:26:19,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-27 21:26:19,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1031 places, 2722 transitions, 83408 flow. Second operand has 32 states, 32 states have (on average 61.6875) internal successors, (1974), 32 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:26:19,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:26:19,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-27 21:26:19,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:26:34,887 INFO L130 PetriNetUnfolder]: 7304/13959 cut-off events. [2023-01-27 21:26:34,887 INFO L131 PetriNetUnfolder]: For 1590603/1590603 co-relation queries the response was YES. [2023-01-27 21:26:35,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217254 conditions, 13959 events. 7304/13959 cut-off events. For 1590603/1590603 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 122943 event pairs, 1313 based on Foata normal form. 6/13965 useless extension candidates. Maximal degree in co-relation 216899. Up to 13238 conditions per place. [2023-01-27 21:26:35,154 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2591 selfloop transitions, 276 changer transitions 3/2870 dead transitions. [2023-01-27 21:26:35,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1064 places, 2870 transitions, 97198 flow [2023-01-27 21:26:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 21:26:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 21:26:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2210 transitions. [2023-01-27 21:26:35,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3155339805825243 [2023-01-27 21:26:35,156 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2210 transitions. [2023-01-27 21:26:35,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2210 transitions. [2023-01-27 21:26:35,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:26:35,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2210 transitions. [2023-01-27 21:26:35,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 65.0) internal successors, (2210), 34 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:26:35,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:26:35,161 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:26:35,161 INFO L175 Difference]: Start difference. First operand has 1031 places, 2722 transitions, 83408 flow. Second operand 34 states and 2210 transitions. [2023-01-27 21:26:35,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1064 places, 2870 transitions, 97198 flow [2023-01-27 21:26:53,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1043 places, 2870 transitions, 95576 flow, removed 517 selfloop flow, removed 21 redundant places. [2023-01-27 21:26:53,310 INFO L231 Difference]: Finished difference. Result has 1049 places, 2780 transitions, 87911 flow [2023-01-27 21:26:53,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=81788, PETRI_DIFFERENCE_MINUEND_PLACES=1010, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=87911, PETRI_PLACES=1049, PETRI_TRANSITIONS=2780} [2023-01-27 21:26:53,311 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1028 predicate places. [2023-01-27 21:26:53,311 INFO L495 AbstractCegarLoop]: Abstraction has has 1049 places, 2780 transitions, 87911 flow [2023-01-27 21:26:53,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 61.6875) internal successors, (1974), 32 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:26:53,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:26:53,311 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:26:53,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-01-27 21:26:53,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:26:53,515 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:26:53,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:26:53,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1818222523, now seen corresponding path program 73 times [2023-01-27 21:26:53,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:26:53,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733524615] [2023-01-27 21:26:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:26:53,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:26:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:26:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:26:54,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:26:54,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733524615] [2023-01-27 21:26:54,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733524615] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:26:54,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306814909] [2023-01-27 21:26:54,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:26:54,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:26:54,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:26:54,203 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:26:54,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-01-27 21:26:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:26:54,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-01-27 21:26:54,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:26:54,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:26:54,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 21:26:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:26:54,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:26:54,941 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset .cse6 4)) (.cse4 (+ c_~A~0.offset .cse6)) (.cse1 (+ c_~A~0.offset 4)) (.cse2 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_2750 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2750) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 .cse2) (select .cse0 c_~A~0.offset)) (+ c_~counter~0 (select .cse0 .cse3) (select .cse0 .cse4) 1)))) (forall ((v_ArrVal_2750 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2750) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse5 .cse3) (select .cse5 .cse4)) (+ (select .cse5 .cse1) (select .cse5 .cse2) (select .cse5 c_~A~0.offset)))))))) is different from false [2023-01-27 21:26:54,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:26:54,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 132 [2023-01-27 21:26:55,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:26:55,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-01-27 21:26:55,176 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:26:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 21:26:55,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306814909] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:26:55,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:26:55,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-01-27 21:26:55,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746743907] [2023-01-27 21:26:55,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:26:55,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-27 21:26:55,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:26:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-27 21:26:55,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1251, Unknown=1, NotChecked=72, Total=1482 [2023-01-27 21:26:55,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-01-27 21:26:55,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1049 places, 2780 transitions, 87911 flow. Second operand has 39 states, 39 states have (on average 57.43589743589744) internal successors, (2240), 39 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:26:55,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:26:55,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-01-27 21:26:55,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:27:12,055 INFO L130 PetriNetUnfolder]: 7503/14346 cut-off events. [2023-01-27 21:27:12,056 INFO L131 PetriNetUnfolder]: For 1709278/1709278 co-relation queries the response was YES. [2023-01-27 21:27:12,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225941 conditions, 14346 events. 7503/14346 cut-off events. For 1709278/1709278 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 127122 event pairs, 1125 based on Foata normal form. 6/14352 useless extension candidates. Maximal degree in co-relation 225581. Up to 13049 conditions per place. [2023-01-27 21:27:12,361 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 2441 selfloop transitions, 477 changer transitions 3/2921 dead transitions. [2023-01-27 21:27:12,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1078 places, 2921 transitions, 100122 flow [2023-01-27 21:27:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 21:27:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 21:27:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1825 transitions. [2023-01-27 21:27:12,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2953074433656958 [2023-01-27 21:27:12,363 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1825 transitions. [2023-01-27 21:27:12,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1825 transitions. [2023-01-27 21:27:12,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:27:12,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1825 transitions. [2023-01-27 21:27:12,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 60.833333333333336) internal successors, (1825), 30 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:27:12,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:27:12,367 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:27:12,367 INFO L175 Difference]: Start difference. First operand has 1049 places, 2780 transitions, 87911 flow. Second operand 30 states and 1825 transitions. [2023-01-27 21:27:12,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1078 places, 2921 transitions, 100122 flow [2023-01-27 21:27:32,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1060 places, 2921 transitions, 96610 flow, removed 1664 selfloop flow, removed 18 redundant places. [2023-01-27 21:27:32,255 INFO L231 Difference]: Finished difference. Result has 1066 places, 2841 transitions, 90460 flow [2023-01-27 21:27:32,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=84399, PETRI_DIFFERENCE_MINUEND_PLACES=1031, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=90460, PETRI_PLACES=1066, PETRI_TRANSITIONS=2841} [2023-01-27 21:27:32,256 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1045 predicate places. [2023-01-27 21:27:32,256 INFO L495 AbstractCegarLoop]: Abstraction has has 1066 places, 2841 transitions, 90460 flow [2023-01-27 21:27:32,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 57.43589743589744) internal successors, (2240), 39 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:27:32,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:27:32,257 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:27:32,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-01-27 21:27:32,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-01-27 21:27:32,462 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:27:32,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:27:32,462 INFO L85 PathProgramCache]: Analyzing trace with hash 2020272735, now seen corresponding path program 74 times [2023-01-27 21:27:32,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:27:32,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272082261] [2023-01-27 21:27:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:27:32,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:27:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:27:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:27:33,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:27:33,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272082261] [2023-01-27 21:27:33,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272082261] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:27:33,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975855389] [2023-01-27 21:27:33,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:27:33,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:27:33,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:27:33,196 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:27:33,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-01-27 21:27:33,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:27:33,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:27:33,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-27 21:27:33,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:27:33,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:27:33,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-27 21:27:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:27:33,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:27:34,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:27:34,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-01-27 21:27:34,575 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-27 21:27:34,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-01-27 21:27:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:27:34,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975855389] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:27:34,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:27:34,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-01-27 21:27:34,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527291300] [2023-01-27 21:27:34,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:27:34,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-27 21:27:34,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:27:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-27 21:27:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1510, Unknown=0, NotChecked=0, Total=1722 [2023-01-27 21:27:34,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:27:34,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1066 places, 2841 transitions, 90460 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:27:34,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:27:34,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:27:34,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:27:52,180 INFO L130 PetriNetUnfolder]: 7574/14479 cut-off events. [2023-01-27 21:27:52,180 INFO L131 PetriNetUnfolder]: For 1669083/1669083 co-relation queries the response was YES. [2023-01-27 21:27:52,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225493 conditions, 14479 events. 7574/14479 cut-off events. For 1669083/1669083 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 128518 event pairs, 1305 based on Foata normal form. 4/14483 useless extension candidates. Maximal degree in co-relation 225126. Up to 13565 conditions per place. [2023-01-27 21:27:52,465 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2577 selfloop transitions, 365 changer transitions 8/2950 dead transitions. [2023-01-27 21:27:52,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1101 places, 2950 transitions, 98126 flow [2023-01-27 21:27:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-27 21:27:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-27 21:27:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2073 transitions. [2023-01-27 21:27:52,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2795307443365696 [2023-01-27 21:27:52,467 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2073 transitions. [2023-01-27 21:27:52,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2073 transitions. [2023-01-27 21:27:52,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:27:52,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2073 transitions. [2023-01-27 21:27:52,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.583333333333336) internal successors, (2073), 36 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:27:52,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:27:52,472 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 206.0) internal successors, (7622), 37 states have internal predecessors, (7622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:27:52,472 INFO L175 Difference]: Start difference. First operand has 1066 places, 2841 transitions, 90460 flow. Second operand 36 states and 2073 transitions. [2023-01-27 21:27:52,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1101 places, 2950 transitions, 98126 flow [2023-01-27 21:28:12,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1082 places, 2950 transitions, 95306 flow, removed 1252 selfloop flow, removed 19 redundant places. [2023-01-27 21:28:12,918 INFO L231 Difference]: Finished difference. Result has 1085 places, 2866 transitions, 89173 flow [2023-01-27 21:28:12,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=87666, PETRI_DIFFERENCE_MINUEND_PLACES=1047, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=89173, PETRI_PLACES=1085, PETRI_TRANSITIONS=2866} [2023-01-27 21:28:12,919 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1064 predicate places. [2023-01-27 21:28:12,919 INFO L495 AbstractCegarLoop]: Abstraction has has 1085 places, 2866 transitions, 89173 flow [2023-01-27 21:28:12,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:28:12,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:28:12,920 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:28:12,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-01-27 21:28:13,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2023-01-27 21:28:13,125 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:28:13,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:28:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1359202547, now seen corresponding path program 75 times [2023-01-27 21:28:13,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:28:13,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299101087] [2023-01-27 21:28:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:28:13,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:28:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:28:13,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:28:13,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299101087] [2023-01-27 21:28:13,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299101087] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:28:13,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11297267] [2023-01-27 21:28:13,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:28:13,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:13,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:28:13,951 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:28:13,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-01-27 21:28:14,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:28:14,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:28:14,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-01-27 21:28:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:28:14,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-01-27 21:28:14,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:28:14,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 21:28:14,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:28:14,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-27 21:28:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:28:14,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:28:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:28:15,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11297267] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:28:15,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:28:15,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 39 [2023-01-27 21:28:15,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835000145] [2023-01-27 21:28:15,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:28:15,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-27 21:28:15,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:28:15,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-27 21:28:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2023-01-27 21:28:15,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:28:15,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1085 places, 2866 transitions, 89173 flow. Second operand has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:28:15,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:28:15,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:28:15,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:28:35,570 INFO L130 PetriNetUnfolder]: 7652/14630 cut-off events. [2023-01-27 21:28:35,570 INFO L131 PetriNetUnfolder]: For 1693253/1693253 co-relation queries the response was YES. [2023-01-27 21:28:35,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227625 conditions, 14630 events. 7652/14630 cut-off events. For 1693253/1693253 co-relation queries the response was YES. Maximal size of possible extension queue 1136. Compared 129345 event pairs, 1315 based on Foata normal form. 3/14633 useless extension candidates. Maximal degree in co-relation 227254. Up to 13645 conditions per place. [2023-01-27 21:28:35,849 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2514 selfloop transitions, 447 changer transitions 10/2971 dead transitions. [2023-01-27 21:28:35,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1125 places, 2971 transitions, 97865 flow [2023-01-27 21:28:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-27 21:28:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-27 21:28:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2332 transitions. [2023-01-27 21:28:35,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27610703291498934 [2023-01-27 21:28:35,852 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2332 transitions. [2023-01-27 21:28:35,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2332 transitions. [2023-01-27 21:28:35,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:28:35,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2332 transitions. [2023-01-27 21:28:35,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 56.8780487804878) internal successors, (2332), 41 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:28:35,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 206.0) internal successors, (8652), 42 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:28:35,857 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 206.0) internal successors, (8652), 42 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:28:35,857 INFO L175 Difference]: Start difference. First operand has 1085 places, 2866 transitions, 89173 flow. Second operand 41 states and 2332 transitions. [2023-01-27 21:28:35,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1125 places, 2971 transitions, 97865 flow [2023-01-27 21:28:56,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1107 places, 2971 transitions, 97615 flow, removed 56 selfloop flow, removed 18 redundant places. [2023-01-27 21:28:56,116 INFO L231 Difference]: Finished difference. Result has 1115 places, 2906 transitions, 92247 flow [2023-01-27 21:28:56,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=88923, PETRI_DIFFERENCE_MINUEND_PLACES=1067, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=92247, PETRI_PLACES=1115, PETRI_TRANSITIONS=2906} [2023-01-27 21:28:56,118 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1094 predicate places. [2023-01-27 21:28:56,118 INFO L495 AbstractCegarLoop]: Abstraction has has 1115 places, 2906 transitions, 92247 flow [2023-01-27 21:28:56,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:28:56,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:28:56,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:28:56,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-01-27 21:28:56,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:56,323 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:28:56,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:28:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1301709571, now seen corresponding path program 76 times [2023-01-27 21:28:56,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:28:56,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862865094] [2023-01-27 21:28:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:28:56,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:28:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:28:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:28:57,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:28:57,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862865094] [2023-01-27 21:28:57,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862865094] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:28:57,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978117812] [2023-01-27 21:28:57,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:28:57,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:28:57,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:28:57,182 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:28:57,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-01-27 21:28:57,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:28:57,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:28:57,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-01-27 21:28:57,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:28:57,662 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 21:28:57,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:28:57,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2023-01-27 21:28:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:28:57,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:28:57,999 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-01-27 21:28:57,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 95 [2023-01-27 21:28:58,188 INFO L321 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-01-27 21:28:58,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 24 [2023-01-27 21:28:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:28:58,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978117812] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:28:58,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:28:58,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2023-01-27 21:28:58,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455003459] [2023-01-27 21:28:58,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:28:58,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-27 21:28:58,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:28:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-27 21:28:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2023-01-27 21:28:58,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-27 21:28:58,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1115 places, 2906 transitions, 92247 flow. Second operand has 41 states, 41 states have (on average 54.41463414634146) internal successors, (2231), 41 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:28:58,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:28:58,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-27 21:28:58,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:29:32,094 INFO L130 PetriNetUnfolder]: 8344/15727 cut-off events. [2023-01-27 21:29:32,095 INFO L131 PetriNetUnfolder]: For 2155676/2155676 co-relation queries the response was YES. [2023-01-27 21:29:32,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261661 conditions, 15727 events. 8344/15727 cut-off events. For 2155676/2155676 co-relation queries the response was YES. Maximal size of possible extension queue 1224. Compared 140025 event pairs, 463 based on Foata normal form. 9/15736 useless extension candidates. Maximal degree in co-relation 261281. Up to 8738 conditions per place. [2023-01-27 21:29:32,412 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 2145 selfloop transitions, 1164 changer transitions 56/3365 dead transitions. [2023-01-27 21:29:32,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1199 places, 3365 transitions, 117631 flow [2023-01-27 21:29:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-01-27 21:29:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-01-27 21:29:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 4870 transitions. [2023-01-27 21:29:32,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2781267846944603 [2023-01-27 21:29:32,416 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 4870 transitions. [2023-01-27 21:29:32,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 4870 transitions. [2023-01-27 21:29:32,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:29:32,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 4870 transitions. [2023-01-27 21:29:32,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 57.294117647058826) internal successors, (4870), 85 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:29:32,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 206.0) internal successors, (17716), 86 states have internal predecessors, (17716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:29:32,426 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 206.0) internal successors, (17716), 86 states have internal predecessors, (17716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:29:32,426 INFO L175 Difference]: Start difference. First operand has 1115 places, 2906 transitions, 92247 flow. Second operand 85 states and 4870 transitions. [2023-01-27 21:29:32,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1199 places, 3365 transitions, 117631 flow Received shutdown request... [2023-01-27 21:29:45,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 21:29:45,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-01-27 21:29:45,646 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 21:29:45,646 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 21:29:45,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:29:45,816 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-27 21:29:45,817 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 21:29:45,817 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 21:29:45,817 INFO L445 BasicCegarLoop]: Path program histogram: [76, 1, 1, 1, 1, 1] [2023-01-27 21:29:45,819 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 21:29:45,819 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 21:29:45,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 09:29:45 BasicIcfg [2023-01-27 21:29:45,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 21:29:45,821 INFO L158 Benchmark]: Toolchain (without parser) took 840673.95ms. Allocated memory was 333.4MB in the beginning and 8.2GB in the end (delta: 7.8GB). Free memory was 273.3MB in the beginning and 4.1GB in the end (delta: -3.8GB). Peak memory consumption was 4.4GB. Max. memory is 16.0GB. [2023-01-27 21:29:45,821 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 333.4MB. Free memory is still 282.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 21:29:45,821 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.47ms. Allocated memory is still 333.4MB. Free memory was 273.1MB in the beginning and 261.7MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 21:29:45,821 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.65ms. Allocated memory is still 333.4MB. Free memory was 261.7MB in the beginning and 259.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:29:45,821 INFO L158 Benchmark]: Boogie Preprocessor took 18.03ms. Allocated memory is still 333.4MB. Free memory was 259.7MB in the beginning and 258.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:29:45,821 INFO L158 Benchmark]: RCFGBuilder took 545.15ms. Allocated memory was 333.4MB in the beginning and 478.2MB in the end (delta: 144.7MB). Free memory was 258.1MB in the beginning and 428.1MB in the end (delta: -170.0MB). Peak memory consumption was 15.4MB. Max. memory is 16.0GB. [2023-01-27 21:29:45,821 INFO L158 Benchmark]: TraceAbstraction took 839914.92ms. Allocated memory was 478.2MB in the beginning and 8.2GB in the end (delta: 7.7GB). Free memory was 427.4MB in the beginning and 4.1GB in the end (delta: -3.7GB). Peak memory consumption was 4.4GB. Max. memory is 16.0GB. [2023-01-27 21:29:45,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 333.4MB. Free memory is still 282.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 168.47ms. Allocated memory is still 333.4MB. Free memory was 273.1MB in the beginning and 261.7MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.65ms. Allocated memory is still 333.4MB. Free memory was 261.7MB in the beginning and 259.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.03ms. Allocated memory is still 333.4MB. Free memory was 259.7MB in the beginning and 258.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 545.15ms. Allocated memory was 333.4MB in the beginning and 478.2MB in the end (delta: 144.7MB). Free memory was 258.1MB in the beginning and 428.1MB in the end (delta: -170.0MB). Peak memory consumption was 15.4MB. Max. memory is 16.0GB. * TraceAbstraction took 839914.92ms. Allocated memory was 478.2MB in the beginning and 8.2GB in the end (delta: 7.7GB). Free memory was 427.4MB in the beginning and 4.1GB in the end (delta: -3.7GB). Peak memory consumption was 4.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 97 PlacesBefore, 21 PlacesAfterwards, 99 TransitionsBefore, 17 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 7 FixpointIterations, 56 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 97 TotalNumberOfCompositions, 585 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 553, independent: 544, independent conditional: 0, independent unconditional: 544, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 264, independent: 259, independent conditional: 0, independent unconditional: 259, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 553, independent: 285, independent conditional: 0, independent unconditional: 285, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 264, unknown conditional: 0, unknown unconditional: 264] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 121 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 839.8s, OverallIterations: 81, TraceHistogramMax: 3, PathProgramHistogramMax: 76, EmptinessCheckTime: 0.0s, AutomataDifference: 698.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9372 SdHoareTripleChecker+Valid, 39.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9372 mSDsluCounter, 3106 SdHoareTripleChecker+Invalid, 34.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2515 IncrementalHoareTripleChecker+Unchecked, 2792 mSDsCounter, 2022 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 72974 IncrementalHoareTripleChecker+Invalid, 77511 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2022 mSolverCounterUnsat, 314 mSDtfsCounter, 72974 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5482 GetRequests, 1744 SyntacticMatches, 223 SemanticMatches, 3515 ConstructedPredicates, 19 IntricatePredicates, 1 DeprecatedPredicates, 55832 ImplicationChecksByTransitivity, 136.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92247occurred in iteration=80, InterpolantAutomatonStates: 1980, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 109.1s InterpolantComputationTime, 3368 NumberOfCodeBlocks, 3368 NumberOfCodeBlocksAsserted, 258 NumberOfCheckSat, 4793 ConstructedInterpolants, 186 QuantifiedInterpolants, 95320 SizeOfPredicates, 2469 NumberOfNonLiveVariables, 20910 ConjunctsInSsa, 6347 ConjunctsInUnsatCore, 237 InterpolantComputations, 5 PerfectInterpolantSequences, 499/3128 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown